Electro-Voice DML-1152A User's Manual
Contents
1. OO OO POWER AMPLIFIER LE LEFT X RIGHT INPUT INPUT TOLEFT DML 1152A LF TO RIGHT 0 0 DML 1152A LF FIGURE 9 Interconnection for Stereo Operation 10 Assembly View of P C Board THE DELTAMAX SYSTEM POWER SUPPLY P C BOARD page 20 THE DELTAMAX SYSTEM Assembly View of P C Board MAIN P C BOARD PAIN e e D page 21 THE DELTAMAX SYSTEM Schematic SCHEMATIC DMC 1152B Page 1 of 6 Schematic THE DELTAMAX SYSTEM SCHEMATIC DMC 1152B Page 2 of 6 nu page 23 Schematic accent e ELILE EIL c ke mi at 2022 vs meee 2 AW doza DMC 1152B Page 3 of 6 THE DELTAMAX SYSTEM SCHEMATIC page 24 Schematic THE DELTAMAX SYSTEM DMC 1152B Page 4 of 6 SCHEMATIC n azto SICH sc 2 o soci Tc 7201 mota deri 25 Ama noo ercu A x nido 71928 1 XT excel WM ku Xi moet THE DELTAMAX SYSTEM Schematic SCHEMATIC DMC 1152B Page 5 of 6 iH 1 S3ovid sdno 834105 9 09 eBed 8ZSLL OWG JILVW3HOS W31SAS wXVIWV L 130 SHL zn 06 0001 JnL00 05 0001 22 92. Eleciro Voice THE DELTAMAX SYSTEM OWNER S MANUAL DMC 1152B CONTROLLER DML 1152A DML 1152MC LOUDSPEAKERS THE DELTAMAX SYSTEM DESCRIPTION GENERAL The DeltaMax DMC 1152B DML 1 152A and DMC 1152B DML 1152MC systems consist of two way biamped high performance speaker systems and companion electronic controllers The DML 1152A is a full range loudspeaker system intended for high level sound reinforcement in touring sound and permanent installation applications The trap ezoidal cabinet shape allows tight cluster designs enabling maximum mutual coupling and single point source arrays The DML 1152MC is a slant monitor version of the DML 1152A The unique circuitry of the DMC controller provides accurate protection for the loudspeakers without the use of shifting high pass or low pass filters shifting cross over frequencies or independent bandpass com pression The electronic protection is invoked only when catastrophic conditions are present for the loudspeakers The result is that accurate fre quency response is maintained from the lowest sound pressure levels to the very highest sound pressure levels available from the loudspeakers There are two models in the 11524 series the DML 1152AP painted finish and the DML 1152APF painted finish with flying hardware The DML 1152MC model is a carpet covered slant monitor version of the DML 1152A and does not have a flying hardware option The
3. NOTE For proper operation of the protection circuitry the power amplifiers must be calibrated to have a voltage gain between 27 and 35 dB 32 dB is optimum See the AMPLIFIER CONTROLLER CALIBRATION section CONNECTOR AND CABLE REQUIREMENTS Controller Connections The DeltaMax controllers have 3 pin XLR type connectors for signal input and output The input is electronically balanced and has a female connector with pin 1 as a referenced ground pin 2 high and pin 3 low The outputs are transformer bal anced and have male connectors with pin assign ments identical to the input Figure 13 illustrates the preferred interconnection between the controller and the power amplifier When driving unbalanced lines pin 3 should be shorted to ground page 13 THE DELTAMAX SYSTEM INSTALLATION continued To hook up the DeltaMax controller to the power amplifiers connect the LF Output of the controller to the input of the low frequency amplifier and the HF Output of the controller to the input of the high frequency amplifier The outputs of the low and high frequency amplifiers are then connected to the LF input woofer and HF input compression driver respectively of the DML 1152A speaker system See the LOUDSPEAKER CONNECTIONS section for details of the loudspeaker wiring See Figures 8 and 9 for two typical system configurations Sense lines must be connected to the DeltaMax controller so that the power
4. C706 C707 C708 C709 C710 C711 712 715 716 C717 0718 C52 059 C60 C69 C208 C211 C216 C217 C220 C13 042 043 C44 C307 C45 C213 0308 C223 0207 0209 0210 C214 215 218 C219 075 505 509 510 C312 0314 0315 C313 A201 A202 A203 204 301 302 A303 A305 A502 A505 A506 503 504 2 A7 AS A1 A3 A10 A11 A12 A16 A4 A13 A18 A21 A20 A501 J2 Ji 94 5 15 02 100307 15 06 037653 15 06 037649 15 06 038210 15 06 037650 15 06 038214 15 06 037652 15 06 037655 15 06 026823 15 06 027367 15 06 037651 15 06 028020 15 06 038211 15 06 038212 15 06 028853 17 01 027338 17 01 028867 17 01 028902 17 01 028905 17 01 028906 17 01 028907 17 01 122832 17 01 124461 17 01 124688 21 01 028908 21 01 124470 21 01 124642 Repair Parts List Capacitor 0 01uf 100V Z5U ceramic Capacitor 0 1uf 50V 2 mylar Capacitor 0 001uf 50V 2 mylar Capacitor 0 001 2uf 100V 2 mylar Capacitor 0 0047uf 100V 2 mylar Capacitor 0 012uf 100V 2 mylar Capacitor 0 0015uf 100V 2 mylar Capacitor 0 0082uf 100V 2 mylar Capacitor 0 01uf 50V 5 mylar Capacitor 0 047uf 50V 5 mylar Capacitor 0 047uf 100V 2 mylar Capacitor 0 022uf 50V 10 mylar Capacitor 0 33uf 100V 2 5 mylar Capacitor 0 0018uf 100V 2 mylar Capacitor 0 0068uf 100V 2 mylar 1 RC4136 1 0 LM339 I C LM393P dbx2150A 1 CA3046 1
5. 027328 47 03 124724 47 03 028251 47 03 121651 47 03 028857 47 03 038218 47 03 028240 47 01 102054 47 01 102106 47 01 102120 47 01 102127 47 03 029035 47 03 037662 47 03 037665 47 03 038077 47 03 038220 47 03 121451 47 03 122858 47 03 122861 47 03 124632 47 03 124646 47 03 124655 47 03 124657 47 03 124669 DMC 1152B Main Board Assembly continued 27 01 038255 Resistor 20 0K 1 UW Resistor 16 2K 1 Resistor 24K 5 YW Resistor 26 7K 1 YW Resistor 30 1K 1 AW Resistor 47 5K 1 HW Resistor 51 1K 1 YW Resistor 90 9K 1 YW Resistor 61 9K 1 YW Resistor 68 1K 1 YW Resistor 180K 5 YW Resistor 100K 1 Resistor 182K 1 YW Resistor 150K 1 4W Resistor 475K 1 Resistor 4 75M 1 AW Resistor 243K 1 Resistor 825K 1 AW Resistor 160K 5 YW Resistor 200K 1 YW Resistor 5 62M 1 Resistor 806 1 YW Resistor 17 8K 1 HW Resistor 6 04K 1 Resistor 14 7K 1 W Resistor 8 06K 1 AW Resistor 536K 1 YW Resistor 51 1K 1 Resistor 100 5 4W Resistor 15K 5 HW Resistor 51K 5 HW Resistor 100K 5 YW Resistor 18 2K 1 Resistor 3 65K 1 UW Resistor 75 0K 1 HW Resistor 3 57M 1 AW Resistor 750 1 Resistor 16 5K 1 YW Resistor 27 4K 1 YW Resistor 35 7K 1 AW Resistor 162K 1 HW Resistor 1 82K 1 Resistor 11 3K 1 Resisto
6. EE EE FREQUENCY IN HERTZ FIGURE 2 DMC 1152B DML 1152A Axial Frequency Response 1 watt 1 meter into LF midband page 3 SN THE DELTAMAX SYSTEM NO 5 5 dB per division HORIZONTAL VERTICAL 9 E 9 25 e 5 82 5 9 a si t 2 eS OJ SEE 5 dB per division HORIZONTAL VERTICAL t n 2 E 3 95 85 5 1 te i THE DELTAMAX SYSTEM THE DELTAMAX SYSTEM Fi ures BEAMWIDTH IN DEGREES 6 dB 8 1 13 E LIS il KNJ gt j pp ops pen DIRECTIVITY FACTOR Re FREQUENCY IN HERTZ FREQUENCY FIGURE 4 DMC 1152B DML 1152A FIGURE 5 DMC 1152B DML 1152A Beamwidth vs Frequency Whole Space Directivity Factor and Directivity Index anechoic vs Frequency Whole Space anechoic Shaped to reflect typical music frequency spectrum LEVEL IN dB KIAMA BRINNA AYA LINJ 3rd HARMONIC 190 FREQUENCY N MERTZ FIGURE 6 DMC 1152B DML 1152A Harmonic Distortion 120 dB SPL 1 meter using typical music frequency spectrum DIRECTIVITY INDEX Di dB page 6 THE DELTAMAX SYSTEM Operation PICTORIAL 1 DMC 1152B Front Panel Diagram OP
7. are critical to ensure that all of the loudspeak rs are protected with only one sense line If in the nor mal course of operation the level settings of the amplifiers are likely to be tampered with the sys tem should be set up with one controller per ampli fier allowing each set of speakers to be monitored In this case each amplifier would be calibrated for 32 dB of gain and any level adjustment of loud speakers would be done with the Output Level trimpots on the controllers It should be noted that when multiple DML 1152A loudspeaker systems are closely assembled in an array a build up of low and lower mid frequencies can occur The cause of this phenomenon is two fold Mutual acoustic coupling between woofers at the lowest frequencies typically below 100 Hz re sults in increased efficiency and hence increased sound pressure level A similar effect occurs when a loudspeaker is placed near a boundary a wall a ceiling a floor etc In the upper bass lower mid range region typically below 500 Hz an array of multiple woofers will have greater directivity a high er Q than that of a single woofer resulting in high er on axis sound pressure levels Because the equalization of the DMC 1152B controller is tailored to provide a flat acoustic frequency response with a single DML 1152A loudspeaker an over emphasis of the low and lower mid frequencies can result when multiple loudspeakers are assembled togeth er The exact
8. at 1 Meter Shaped Spectrum see Figure 6 Second Harmonic 100 Hz 4 396 800 Hz 1 096 Third Harmonic 100 Hz 0 7 800 Hz 1 4 2 000 Hz 0 796 5 000 Hz 1 796 THE DELTAMAX SYSTEM Specifications SPEAKER SPECIFICATIONS Transducer Complement High Frequency DH1A compression driver 2 inch exit Low Frequency DL15X 15 inch woofer Efficiency High Frequency 2596 Low Frequency 5 0 Long Term Average Power Handling Capacity High Frequency per AES2 1984 75 watts Low Frequency per RS 426A 400 watts Short Term Power Handling Capacity High Frequency 300 watts Low Frequency 1 600 watts Maximum Long Term Midband Acoustic Output High Frequency 18 8 watts Low Frequency 20 0 watts Nominal Impedance High Frequency 8 ohms Low Frequency 8 ohms IZ FREQUENCY IN HERTZ RESPONSE IN 48 rur 7 77 nd pf 5 FIGURE 1 DMC 1152B Frequency Response Minimum Impedance High Frequency 6 5 ohms Low Frequency 7 9 ohms Dimensions Height 75 9 cm 29 88 in Width 45 2 cm 17 78 in Depth 41 4 cm 16 28 in Net Weight 43 3 kg 96 Ib Shipping Weight 47 4 kg 105 Ib Enclosure Materials Structural 3 s inch 14 ply birch plywood Finish Black textured paint Grille Steel with charcoal gray foam Hanging DML 1152APF only 3 point flying system accepts Aeroquip 32326 and 32343 fittings ka
9. band in each controller when the control voltages are slaved page 11 THE DELTAMAX SYSTEM AMPLIFIER CONTROLLER CALIBRATION AMPLIFIER CALIBRATION PROCEDURE Maximum performance of the DeltaMax controller protection circuitry occurs under the most severely over driven conditions when the voltage gain of the amplifiers fall in the range of 27 to 35 dB with 32 dB being optimum This gain range is typical of most high power amplifiers and can easily be ad justed by simply adjusting the level controls on the amplitier The procedure for calibrating an amplifier to have 32 dB of gain is as follows 1 With the amplifier turned on and without speak ers hooked on the amplifier output apply 0 5 volt rms 1 000 Hz sinewave signal to the input of the amplifier 2 Adjust the amplifier level control until the output of the amplifier measures 20 volts rms NOTE If the amplifier will be operated in the mono bridged mode it should be calibrated when wired in the mono bridged configuration CONTROLLER CALIBRATION PROCEDURE This procedure is for calibration of the DMC controller s internal amplifier limit circuits to the ac tual clip level of the power amplifiers Calibration is set by the LF and HF Amplifier Calibration trimpots on the front panel Before plugging in the ac power cord be sure the controller is wired for the correct primary mains voltage Disconnect the speakers and remove the security cover from the con
10. by the calibrated markings on the front panel of the controller Note also that this is the maximum amount of power capable of being delivered to a single driver in this amplifier configuration If the power rating of the high frequency power am plifier is much greater than 250 watts and hence the HF Amplifier Calibration trimpot on the controller is set much greater than 250 watts then an additional margin of safety for the high frequency driver can be obtained by setting the HF Amplifier Calibration trimpot to 250 watts page 12 THE DELTAMAX SYSTEM Amplifier Controller Calibration installation AMPLIFIER CALIBRATION PROCEDURE continued The HF section of the controller is now calibrat ed The HF Output Level trimpot may be ad justed as necessary for the desired frequency spectrum balance without affecting calibration 12 Remove the shorted 4 inch phone plug from the Gain Control Bus jack and set the Cal Clip Limit switch to the Limit position out Set the HF and LF Output Level controls to their center detent position or as desired 13 Turn the amplifier off and connect the speaker cables to the output of the amplifier Make cer tain that the lows are wired to the woofer and that the highs are wired to the compression driver In addition be sure to observe polarity when making speaker connections NOTES A The Amplifier Calibration trimpots may be adjusted during use with program material to
11. malfunction resulting from misuse or abuse of the product or e malfunction occurring at any time after repairs have been made to the product by anyone other than Electro Voice or any of its autho rized service representatives Obtaining Warranty Service To obtain warranty service a customer must deliver the product prepaid to Electro Voice or any of its authorized service representatives to ther with proof of purchase of the product in the orm of a bill of sale or receipted invoice A list of authorized service representatives is available from Electro Voice at 600 Cecil Street Buchanan MI 49107 616 695 6831 or 800 234 6831 and or Electro Voice West at 8234 Doe Avenue Visalia CA 93291 209 651 7777 or 800 825 1242 Inci dental and Consequential Damages Excluded Product repair or replacement and return to the customer are the only remedies provided to the customer Electro Voice shall not be liable for any incidental or consequential damages including without limitation injury to persons or property or loss of use Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you Other Rights This warranty gives you spe cific legal rights and you may also have other rights which vary from state to state Electro Voice Speakers and Speaker Systems are guaranteed against malfunction due to defects in materials or workmanship for a period o
12. nature of this phenomenon will de pend on the details of the array the number of loudspeakers their spacing the splay angles prox imity to boundaries etc An increase in acoustic response at these frequencies can result in low frequency feedback or unwanted rumble and is best dealt with using a graphic or parametric equal izer SPEAKER INSTALLATION The DML 1152APF is a flying version of the DML 1152AP Each cabinet has a total of six steel reinforced aircraft type pan fittings three on the top and three on the bottom This three point flying system makes maximum use of the trapezoidal cabinets permitting a wide range of angle adjust ment and offering maximum flexibility in array de sign and implementation for both the touring sound company and the sound contractor The pan fit tings mate with the Aeroquip 32343 and 32326 twelve jaw fittings Electro Voice offers the DMS series of rigging hardware a complete line of flying accessories to be used with the DML speaker sys tems page 15 THE DELTAMAX SYSTEM INSTALLATION continued CAUTION The DML 1152APF speaker systems should be suspended overhead only in accordance with the procedures and limitations specified in the DML 1152AF Flying Manual which is packed with each flying speaker system Each DML 1152A speaker system comes with four rubber feet and mounting screws as accessories for the user to install as an option if desired Rubber feet on t
13. of the speakers page 8 THE DELTAMAX SYSTEM Operation OPERATION continued 5 AMPLIFIER CALIBRATION CONTROLS These controls are used for calibrating the con troller to both the low and high frequency am plifiers so that the controller can monitor the clipping of the amplifier outputs and if desired act as a limiter to prevent amplifier clipping See AMPLIFIER CONTROLLER CALIBRA TION section NOTE The calibrated markings on the front panel correspond to the power level that an amplifier would deliver to an 8 ohm load A crude approximate calibration can be ob tained by rotating the control until the slot of the trimpot points at a power level equivalent to the amplifier power rating for an 8 ohm load When the trimpot is in its mid position it is pointing at 400 watts 6 CAL CLIP LIMIT SWITCH This switch selects the mode that controller will monitor the amplifi ers assuming that the controller has been cali brated to the amplifiers see AMPLIFIER CONTROLLER CALIBRATION section With the switch pushed in the Amplifier Limit LED s will indicate when the amplifiers are clipping With the switch in the outward position the Am plifier Limit LED s will indicate that gain reduc tion is occurring to prevent the amplifiers from clipping NOTE If the controller has not been cali brated to both the low and high frequency amplifiers the Cal Clip Limit switch should be pushed in This will defeat the compr
14. set the desired amount of amplifier limiting The limiter in the controller will allow some fast transient peaks through allowing some amplifier clipping to occur on signal peaks after the calibration procedure The limiter circuit will however prevent long term amplifier clipping when adjusted properly B The Cal Clip Limit switch may be left in the recessed Cal Clip position in if the power amplifier has an internal limiter or if clip protection is not desired When left in the Cal Clip position the Amplifier Output Limiter indicators on the front panel of the controller will indicate when the amplifier is self limiting or clipping C Iftwo or more speakers are connected in parallel to an amplifier output most amplifiers will exhibit a drop in clipping voltage due to the lower load impedance This will require that the Amplifier Calibration trimpot be set to a value slightly lower than the value obtained in the no load calibration test Note that the result of this is that even when multiple speakers are paralleled on an amplifier channel the Amplifier Calibration trimpot will always end up pointing at the maximum amount of power on the calibrated markings on the front panel that the amplifier is capable of delivering to each individual driver no matter how many drivers are connected in parallel D Do not change the amplifier gain or recalibration will be necessary Use the LF and HF Output Level controls on th
15. temperature limits will not be exceeded for either the woofer or compression driver B EXCURSION LIMIT These LED s light when the excursion of the woofer cone or compression driver diaphragm approach their maximum allowable limit Under this condition voltage clamping will occur at the output of either the low or high frequency section so that the maximum excursion limits will not be exceeded for either the woofer or compression driver C AMPLIFIER LIMIT These LED s will provide status information for the high and low frequency power amplifiers if the controller has been calibrated to the amplifiers See the AMPLIFIER CONTROLLER CALIBRATION section With the Cal Clip Limit switch pressed in the LED s will signal the occurence of amplifier clipping With the switch in the outward position the LED s indicate that gain reduction in the form of hard limiting is occurring at the input of the controller to prevent the amplifiers from clipping OUTPUT LEVEL CONTROLS A LF This control adjusts the level of the low frequency output signal The control range is from 12 dB to 12 dB NOTE The gain has been structured within the DMC 1152B controller so that DML 1152A loudspeaker will have a flat frequency re sponse as shown in Figure 3 in an anechoic environment with the output levels of the controllers set in the 0 dB detent position and with the amplifier channels having identical gain driving the LF and HF sections
16. with the seven screws Mounting The unit is one rack space high 13 4 in and fits a standard EIA 19 inch rack To make wiring easier mount the controller near the power amplifier s Grounding A widely accepted grounding technique for audio systems is the star connection single point ground The final configuration will be determined by the size of the system and the equipment used in the system However the star connection is rec ommended as a starting point The interconnecting cables of line level equipment such as the DeltaMax controller should have the shields connected at one point only usually the re ceiving end of the signal transmission See Figure 14 Never lift the third wire safety ground of the ac power cable It protects against possible shock hazard 220 VAC PRIMARY WIRING TABLE I Primary Power Conversion Chart for 100 120 220 and 240 V 50 60 Hz Operation page 16 THE DELTAMAX SYSTEM INSTALLATION continued When deciding how to best ground the controller in a particular system note that the controller s input and output XLR type connectors have pin 1 refer enced to chassis ground through a 20 k resistor and a 01bF capacitor This minimizes the possibil ity of a ground loop Circuit ground ties to the chas sis ground internally at one point The input to the controller is active differential and the output is transformer isolated Ventilation Adequate ventilation should be
17. 24505 15 02 026884 17 01 121660 17 01 121659 17 01 119087 48 02 037580 48 02 042787 39 01 124973 51 04 124634 56 08 025906 15 01 027316 15 01 027317 15 01 027327 15 01 028703 15 01 028850 15 01 028851 15 01 122935 15 01 026831 15 02 027325 15 02 027320 15 02 027455 15 06 037470 15 06 028065 DMC 1152B REPAIR PARTS LIST Power Supply Board Assembly 27 01 038256 Capacitor 10uf 50 volt aluminum electroylitic Radial Lead Capacitor 1000uf 50 volt aluminum electroylitic Radial Lead Capacitor 0 01uf 250 volt ceramic UL approved 1 voltage regulator 15V LM7815 1 voltage regulator 15V LM7915 I C voltage regulator 5V LM7805 Bridge Rectifier 1 5 amp pc mount Diode 1N4004 400V 1A LED green Fuse 175mA 250V slow blow Transformer power mount DMC 1152B Main Board Assembly 27 01 038255 Capacitor 100uf 35V aluminum electrolytic Capacitor 1000uf 35V aluminum electrolytic Capacitor 47uf 25V aluminum electrolytic Capacitor 4 7uf 63V aluminum electolytic Capacitor 1uf 35V aluminum electrolytic Capacitor 2 2uf 35V aluminum electrolytic Capacitor 10uf 35V aluminum electrolytic Capacitor 220pf 50V ceramic Capacitor 150pf 100V ceramic Capacitor 0 0015uf 50V 5 mylar Capacitor 100pf 50V ceramic Capacitor 330pf Capacitor 0 01uf 50V 2 mylar C7 08 C701 C702 C703 C704 C705
18. DML 1152A and DML 1152MC employ a 15 inch woofer for low frequency reproduction and a standard 2 inch exit DH1A compression driver The systems use flat front constant directivity high frequency homs which are based on the Electro Voice HP series Patent 4 685 532 and are geometrically optimized for performance from 1 250 Hz to 20 000 Hz The DeltaMax flying version model DML 1152APF includes three steel reinforced aircraft type pan fittings on the top and bottom of the enclosures to facilitate the hanging of multi cabinet arrays Each DeltaMax flying system is packed with a separate owner s manual which pro vides specific hanging instructions The electronic circuits are designed to provide optimum audio performance even when the audio drive level is increased for maximum loudness Precise speaker modeling circuits control a high performance compressor and voltage limiter which provide speaker excursion protection voice coil temperature protection and amplifier maximum power limiting Where very high levels of deep bass are required the DMC 2181S DML 2181A DeltaMax subwoof er system may be added to the DMC 1152B DML 11524 or the DMC 1152B DML 1152MC combinations The DML 2181A loudspeaker cabi net with two manifolded eighteen inch speakers Description and the DMC 2181 series electronic controllers were designed specifically to work in conjunction with the two way systems to provide extremely high level low f
19. ERATION FRONT PANEL INDICATORS AND CONTROLS refer to pictorial 1 1 INPUT LEVEL INDICATORS Three LEDs show the drive level at the input of the control ler Levels are calibrated in dBu 20 0 16 NOTE Do not allow the 16 dB input level indicator to stay on continuously If the 16 dB indicator is allowed to stay on for long periods the input circuit will clip The input signal should be reduced until the 16 dB indicator lights only on loud instantaneous peaks GAIN REDUCTION INDICATORS Three LEDs show how much gain reduction is occur ring in the compressor at the input of the con troller The display is calibrated in relative dB 3 6 12 Gain reduction occurs only when the maximum temperature excursion and amplifier capabilities are exceeded for either the woofer or compression driver The Output Limits dis play indicates which limits are being exceeded when gain reduction occurs NOTE Do not allow the 12 dB gain reduction indicator to stay on continuously If the 12 dB indicator is allowed to stay on for long periods the speaker may be damaged The input signal should be reduced until the 12 dB indicator lights only on loud passages 3 OUTPUT LIMIT INDICATORS A TEMPERATURE LIMIT These LED s light when the temperatures of the woofer or compression driver voice coils approach their maximum allowable limit Under this condition gain reduction will occur at the input of the controller so that the maximum
20. HF This connection is the high frequency output of the DMC crossover controller and should be connected to the input of the high frequency amplifier PICTORIAL 2 DMC 1152B Back Panel Diagram THE DELTAMAX SYSTEM Operation OPERATION continued 5 GAIN CONTROL BUS This 4 inch jack is for slaving the gain control busses of other DMC controllers to enable gain tracking in a multiple controller system See CONNECTOR and CABLE REQUIREMENTS section for detailed wiring information 6 INPUT This connection is for the full range signal input to the DMC controller This input is electronically balanced with a female 3 pin XLR type connector with pin 1 as a ground ref erence 2 high and pin low See CONNECTOR and CABLE REQUIREMENTS section for detailed wiring information TYPICAL SYSTEM OPERATION The DML 1152A is a full range biamped loudspeak er system to be used with the DMC 1152B elec tronic controller The DML 1152MC is a slant monitor version of the DML 1152A and is also used with the DMC 1152B controller Besides con ventional frequency division the DMC electronic controllers have equalization and time delay to ob tain optimum performance from their respective DeltaMax DML loudspeaker systems In addition sense lines to the controllers monitor the voltage drive to each loudspeaker in the system and auto matically activate protection circuitry to prevent cone diaphragm overexcursion voice co
21. NE5517N I C NE5532A 1 TLO74CN 1 TLO72CP Connector inch phono jack right angle Connector XLR female right angle Connector XLR male right angle page 29 THE DELTAMAX SYSTEM Repair Parts List DMC 1152B Main Board Assembly continued 27 01 038255 D507 D509 D508 D510 D511 D512 D513 D514 0516 0517 0519 0520 R161 R271 R329 R236 R13 R244 R270 R510 R2 R5 R117 R141 R10 R509 17 8514 8523 R525 R526 R219 R527 R528 R536 R539 R546 R547 R549 R550 R552 R553 R221 R251 R319 R321 R101 R518 R519 R37 R210 R343 R39 R350 R146 R162 R314 R517 R14 R214 R235 R310 R506 R22 R30 R92 R119 R364 R143 R265 R3 R4 R6 R7 R108 R109 R111 R112 R114 R115 R116 R125 R126 R128 R129 R131 R132 R134 R135 R137 R139 R140 R212 R213 R216 R222 R224 R225 R227 R237 R238 R242 R243 R249 R250 R268 R312 R313 R316 R324 R325 R326 R337 R338 R342 R351 R361 R501 R502 R535 R592 R9 R20 R121 R18 R24 R25 R328 R507 R583 R585 R587 page 30 39 01 028846 39 01 028893 39 01 028894 47 03 124678 47 03 038233 47 01 028860 47 03 038215 47 01 028864 47 03 038222 47 03 037770 47 03 038221 47 03 038717 47 03 121532 47 03 124676 47 03 119012 47 03 124957 47 03 124677 47 03 038219 47 03 037660 47 03 124838 47 03 028695 47 03 124673 47 03 109437 47 03 124685 47 03 123010 47 03 124484 LED green LED red LED yellow Resistor 3 01K 1 AW Resi
22. and 16 dBu To avoid clipping the input should be driven only to the point that the 16 dB LED lights on instantaneous peaks If more gain is desired from the controller the Output Level trimpots may be turned up Note that there are cali brated markings on the front panel of the controller 3 dB per division to enable accurate gain adjust ments Extensive modeling circuits allow the controller to monitor the status of the voice coil temperature and the cone diaphragm excursion of the loudspeakers in each frequency band If a loudspeaker in one of the frequency bands approaches its maximum ther mal limit a multi time constant compressor circuit with a variable compression ratio will reduce the peak and average levels of the full range input sig nal as necessary to protect the driver while pre serving the spectral balance and the relative program dynamics When gain reduction occurs an Output Limit Temperature LED will light indicat ing which frequency band loudspeaker is reaching its thermal limit If a loudspeaker in one of the fre quency bands approaches its maximum excursion limit a dynamic frequency sensitive voltage clamp ing circuit at the output of that frequency band will clamp the peak of the output waveform at a level above which excursion damage would occur to the loudspeaker hence preserving the overall spectral balance When voltage clamping occurs an Output Limit Excursion LED will light indicating which fre qu
23. ction activation loudspeaker excursion protec tion activation and amplifier clipping or amplifier clipping prevention In addition there is an LED display to indicate the amount of long term overall gain reduction occurring due to loudspeaker ther mal protection and amplifier clipping prevention The instantaneous loudspeaker excursion voltage clamping protection is not reflected in the overall gain reduction display In very high powered applications the detailed dis plays on the DMC controllers provide the user with information to make adjustments or changes to the system if desired to eliminate the protection and increase the acoustic output For example e If an excessive amount of low frequency protec tion is occurring selective equalization can be used s octave band equalizer parametric equalizer etc to reduce the level in the fre quency range that is causing the excessive ex cursion allowing the overall level to be turned up If the desired amount of high level low frequency response still cannot be obtained subwoofers or additional subwoofers should be added to the system e If an excessive amount of loudspeaker thermal protection is occurring in any frequency band more speaker systems are generally needed If the program material has a lot of energy concen trated in a relatively small frequency range se lective equalization may serve as an effective compromise Operation e If excessive amplifie
24. e controller to change power amplifier drive levels The Output Level controls do not affect controller calibration INSTALLATION AMPLIFIER REQUIREMENTS Professional power amplifiers with the following ratings are recommended for use with the DMC 1152B DML 1152A system LF 400 800 watts continuous into eight ohms HF 125 250 watts continuous into eight ohms The use of amplifiers with lower power ratings is acceptable however the full power capabilities of the system will not be realized The use of amplifi ers with significantly higher power ratings is waste ful and may endanger the loudspeakers it is generally not recommended Under certain circumstances however higher rated power amplifiers are acceptable It is acceptable to drive the DML 1152A speaker with a stereo power amplifier having the recommended LF power rating utilizing one channe to drive the low frequencies and the other channel to drive the high frequencies For an extra degree of protection when operating in this configuration the user may want to set the HF Amplifier Calibration level to the 250 watt position to limit excessively high power levels from reaching the compression driver DML 1152A speakers may be paralleled with other DML 1152A speakers if the amplifier is capable of delivering adequate power to each speaker at the lower impedance Under no circumstances should DML 1122A and DML 1152A speakers be paral leled on the same amplifier channels
25. el shows amplifier limit ex cursion limit and temperature limit When its limit is approached each LED lights yellow Speaker system is trapezoidal for compact ar rays Flying versions feature integral steel rein forced fittings to facilitate hanging Both the woofer and the compression driver em ploy the best available technology for high power and accurate sound reproduction A state of the art flat front constant directivity horn is utilized for even coverage and flat re sponse page 1 THE DELTAMAX SYSTEM Specifications CONTROLLER SPECIFICATIONS CHANNEL CONFIGURATIONS Monoaural two way two sense channels FILTER TYPE 4th order Linkwitz Riley CROSSOVER FREQUENCY 1 100 Hz GAIN 5 dB nominal SIGNAL PATH EQUALIZATION see Figure 1 LF EQ 3 dB at 33 Hz 10 dB at 55 Hz LF Signal Delay 0 49 ms at crossover frequency HF EQ 4th order optimized for DML 1152A series HF driver and horn TOTAL HARMONIC DISTORTION 20 20 000 Hz 0 03 typical 0 1 maximum NOISE EACH OUTPUT 20 20 000 Hz NBW TYPICAL 86 dBu Electronically balanced differential Maximum Level 18 dBu Impedance 27 000 ohms and 0015mf CMRR Typical 55 dB Connector Female 3 pin XLR type SENSE CHANNEL INPUTS Type Floating differential Maximum Level LF 145 V rms HF 145 V rms Impedance 100 kilohms each side to ground Connector Two five way binding posts OUTPUTS LF and HF Type Transformer floating d
26. ency band loudspeaker is reaching its excursion limit The DMC Controller will also prevent long term amplifier clipping The controller must be calibrated as detailed in the AMPLIFIER CONTROLLER CALIBRATION section and the Cal Clip Limit switch must be in the Out position for this function to work properly If an amplifier in one of the fre quency bands approaches clipping a multi time constant compressor limiter circuit will reduce the peak and average levels of the full range input sig nal as necessary to prevent long term clipping while preserving the overall spectral balance When gain reduction occurs an Output Limit Ampli fier LED will light indicating which frequency band amplifier is reaching its power limit With the Cal Clip Limit switch pushed in gain reduction will not occur to prevent amplifier clipping and the Output Limit Amplifier LED s will simply indicate when the amplifiers are going into clipping The DeltaMax DMC controllers provide protection for the loudspeakers without affecting the overall spectral balance or dynamic range The controllers have an LED display to inform the user when the protection circuitry is activated and what is causing the protection to take place Each frequency band n em dMdME EM page 10 THE DELTAMAX SYSTEM OPERATION continued has three LED s to indicate loudspeaker thermal prote
27. er cutouts in the baffle board and may be removed from the horn using a 3 s inch socket wrench A woofer failure will require re placement of the entire driver In the case of com pression driver failure a diaphragm assembly replacement kit with instructions is available or if desired the complete driver may be returned for service Listed below are the available driver replacement and or repair parts as well as a variety of other user serviceable items that are available from the Electro Voice service department in Buchanan Michigan Service Warranty WARRANTY Limited Electro Voice products are guaranteed against mal function due to defects in materials or workmanship for a specified period as noted in the individual product line statement s below or in the individual product data sheet or owner s manual beginning with the date of original purchase If such malfunc tion occurs during the specified period the product will be repaired or replaced at our option without charge The product will be returned to the cus tomer prepaid Exclusions and Limitations The Limited Warranty does not apply to a exterior fin ish or appearance b certain specific items de scribed in the individual product line statement s below or in the individual product data sheet or owner s manual c malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner s manual d
28. essor limiter from trying to prevent amplifier clipping The Amplifier Limit LED s will still flash when the amplifier exceeds the power levels that the Amplifier Calibration trimpots are set to Poor sound quality can result with incorrect calibra tion and the compressor limiter engaged 7 POWERINDICATOR This LED lights when the controller is on 8 POWER SWITCH This switch turns the con troller on and off BACK PANEL CONNECTIONS refer to Pictorial 2 1 AC POWER CORD RECEPTACLE This re ceptacle is for the ac power cord supplied with the unit 2 FUSE RECEPTACLE This fuse receptacle requires either a 0 25 A 250 V slow blow fuse for 100 120 V ac operation or a 0 1 A 250 V slow blow fuse for 220 240 V ac operation 3 SENSE INPUTS A LF This input is for the connection of the sense line to monitor the power delivered to the woofer and should be connected to the output of the low frequency amplifier B HF This input is for the connection of the sense line to monitor the power delivered to the compression driver and should be connected to the output of the high frequency amplifier NOTE The Sense Inputs are floating differen tial with 5 way binding posts see CONNEC TOR and CABLE REQUIREMENTS section for detailed wiring information 4 OUTPUTS A LF This input is the low frequency output of the DMC crossover controller and should be connected to the input of the low frequency amplifier B
29. f amplifier channels that can be driven by a single output of a controller is limited only by the total combined input impedance of the paralleled amplifiers The DeltaMax controller outputs can drive a combined impedance of 600 ohms or greater For example sixteen amplifiers each having an input impedance of 10 k ohms can be paralleled off of one DMC out put If itis necessary to parallel additional amplifi ers line level distribution amplifiers will have to be employed to drive the amplifier inputs Alternative ly multiple DMC controllers with paralleled inputs could be used to distribute the amplifier load For the case where all of the DeltaMax loud speakers are paralleled on the output of a single amplifier channel and only one controller is used the sense line to that controller is connected to the output of the amplifier In this case all of the loud speakers are driven at the same level and the con troller monitors the voltage drive to each speaker Make sure that the amplifier is calibrated for 32 dB of gain and that the controller is calibrated to the amplifier see AMPLIFIER CONTROLLER CALI BRATION section For the case where the Delta Max loudspeakers are powered by multiple amplifiers all driven at the same leve and only one controller is used the sense line to that controller is connected to any one of the amplifier outputs Note that this requires the use of identical amplifiers each calibrated fo
30. f five 5 years from the date of original purchase The Lim ited Warranty does not apply to burned voice coils or malfunctions such as cone and or coil damage resulting from improperly designed enclosures Electro Voice Electronics are guaranteed against malfunction due to defects in materials or workman ship for a period of three 3 years from the date of original purchase Electro Voice Flying Hardware including enclosure mounted hardware and rigging EV Part Numbers accessories is guaranteed against malfunction due item DML T152AP 1152APF DML 1152MC a period z of one ear from the date of original Dco EE perche details are included in the Uni GIVE ENa form Limited Warranty statement L late assy 81680 81680 79713 72690 Service and repair address for this product Electro 81923 81872 Voice Inc 600 Cecil Street Buchanan Michigan 49107 616 695 6831 or 800 234 6831 Connector NLAMPR 17305 17305 Specifications subject to change without notice Cable Connector 17306 17306 page 28 C1 05 06 C3 04 C2 U1 CR1 CR2 CRS CR4 Fi Ti C53 C70 6222 0322 206 306 54 C71 C12 C6 C11 0321 C221 0201 0203 0212 0224 0301 0303 C324 C14 041 050 051 058 C67 C68 61 03 04 05 C9 0202 C203 C10 2 15 20 21 C22 23 055 C56 057 072 073 074 THE DELTAMAX SYSTEM 15 01 2 15 01 1
31. he enclosure lessens the possibility of slip ping and sliding in applications where the speaker systems are stacked CONTROLLER INSTALLATION Power Source The DMC 1152B comes prewired from the factory for operation at 120 volts To operate at 240 volts the primary wiring of the power transformer must be altered CAUTION Hazardous voltages and currents may be en countered within the chassis The service infor mation contained within this document is for use by Electro Voice authorized warranty sta tions and qualified service personnel only To change the transformer primary wiring configu ration use the following procedure 1 Unplug the controllers power cord from the ac power source 2 Remove the seven screws securing the top cover There are two screws on each side two Screws on the rear and one screw in the front panel center top 100 VAC PRIMARY WIRING Installation 3 Locate the eight voltage select solder cups near the power transformer Referring to Table 1 reconnect the leads corresponding to the de sired primary voltage 4 Install the correct line fuse See values in Table II 5 Plug the power cord into an ac outlet and turn the controller on Measure the voltage at the points shown in the PCB diagram The mea sured voltage should be 22 volts If the mea sured voltage is not within 1096 of this value turn the unit off and check the connections in step 3 6 Reinstall the top cover
32. ifferential Maximum Level 18 dBu Minimum Load Impedance for Full Level 600 ohms Connectors Male 3 pin XLR type POWER REQUIREMENTS 100 120 220 240 V ac 50 60 Hz 13 W CHASSIS CONSTRUCTION Painted steel COLORS Gray front panel black chassis with white graphics MOUNTING EIA 19 inch rack mount 1 75 in high 8 97 in behind panel including connectors supplied with front panel security cover for controls SYSTEM SPECIFICATIONS Frequency Response Measured in Farfield Calculated to One Meter on Axis Swept One Third Octave Pink Noise One Watt into LF Midband 2 83 V at 250 Hz Anechoic Environment 3 dB see Figure 2 50 20 000 Hz Sound Pressure Level at One Meter One Watt Input Power Anechoic Environment Band Limited Pink Noise Signal High Frequency 112 dB Low Frequency 100 dB Typical System Maximum Continuous Sound Pressure Levels at One Meter Anechoic Environment 126 dB Typical System Maximum Peak Sound Pressure Levels at One Meter Anechoic Environment 132 dB Crossover Frequency 1 100 Hz Beamwidth Angle Included by 6 dB Down Points on Polar Responses Indicated One Third Octave Bands of Pink Noise see Figure 4 1 2 20 kHz Horizontal 60 25 5 1 2 20 kHz Vertical 40 25 5 Directivity Factor R Q 1 0 20 kHz Median see Figure 5 19 3 412 8 7 3 Directivity Index D 1 0 20 kHz Median see Figure 5 12 1 dB 3 0 dB 1 3 dB Distortion 120 dB SPL
33. il overheat ing and amplifier clipping Before operating a DeltaMax system the user should read this man ual thoroughly and make sure that the system has been set up as detailed in the INSTALLATION sec tion and the amplifiers and controller have been calibrated as detailed in the AMPLIFIER CON TROLLER CALIBRATION section The gain and equalization structures in the DMC controllers have been set up so that the DML loud speaker systems will have a flat frequency re sponse in an anechoic environment when the Output Level trimpots on the controllers are set in the 0 dB detent position and the amplifiers all have the gain i e the amplifiers are calibrated for 32 dB of gain as detailed in the AMPLIFIER CON TROLLER CALIBRATION section This gives the user a standard reference every time the system is setup Adjustments to the drive levels of the low and high frequency sections are then only needed to compensate for room acoustics or array configu rations When adjustments are required they should be made with the Output Level trimpots on the controllers The level controls on the amplifiers should be left in their calibrated positions See the MULTIPLE LOUDSPEAKER ARRAY section for circumstances when it is permissible to adjust the amplifier level controls The input circuit of the DMC controllers clips with a 18 dBu 6 2 volts rms input signal The input signal level display has three LED s calibrated to 20 0
34. in YOOTNI 245 THE DELTAMAX SYSTEM SERVICE WARRANTY INFORMATION SHIPPING DAMAGE Inspect the shipping carton for possible damage If damage is found notify the transportation company immediately Save the carton as evidence for the carrier to inspect If damage occurs during ship ping it is the responsibility of the consignee to file a claim with the carrier If the carton is in good condi tion but the unit is damaged call Electro Voice Included in the box with the DeltaMax Controller is a power cord warranty card two operating volt age labels a o amp fuse for 220 240 V ac and this manual FIELD SERVICE Controller power Inspection If the DMC power indicator does not light Check the power switch Check the line cord Check the fuse Check the mains voltage and DMC operating voltage configuration SERVICING THE SPEAKER SYSTEM The DML 1152A was designed for expedient field service The foam grille may be removed by simply grabbing a corner and gently peeling it off Once the screws securing the steel grille are removed using a 2 Phillips screwdriver the grille may be lifted off Loosening the four woofer clamp bolts using a straight blade screwdriver or a 3 e inch nutdriver or socket wrench allows the woofer to be easily removed Once the horn mounting screws are removed using a 2 Phillips screwdriver the compression driver may be accessed through both the horn and woof
35. in a variety of ways There does not need to be one controller for every speaker cabinet Generally there only needs to be as many control lers as there are different program sources For example a monaural program source requires one DMC 1152B controller a stereo program source requires two DMC 1152B controllers etc In addi tion DMC 2181S DML 2181A subwoofer system may be added to a DMC 1152B DML 1152A sys tem The DMC 21818 is a stereo controller with left and right high outputs above 100 Hz and a mono summed sub output below 100 Hz A monaural program source requires one 21815 control ler and one DMC 1152B controller a stereo pro gram source requires one DMC 2181S controller and two DMC 1152B controllers For the sake of simplicity the following discussion will be confined to the various possible connection schemes for arrays of identical loudspeakers with only one program source and without subwoofers A stereo array can be broken down and analyzed as two separate arrays each having a separate program source Subwoofer wiring is addressed in the DMC 2181S Owner s Manual Amplifier in puts outputs and sense lines will be addressed in the discussion The outputs SUB OUT LF OUT HF OUT etc of the DMC controllers are connected to the inputs of page 14 THE DELTAMAX SYSTEM INSTALLATION continued multiple amplifier channels through the use of Y cords or multiple Y cords The number o
36. levels being delivered to the woofer and compression driver can be moni tored This is accomplished by connecting the out put of the low frequency amplifier to the LF Sense Input on the controller and the output of the high frequency amplifier to the HF Sense Input on the controller The sense input connectors are 5 way binding posts wired in a floating differential configu ration This configuration makes it possible to con nect sense lines to a bridged amplifier without shorting out one of the legs of the amplifier High quality banana plugs may be used for these con nections but wires underneath the binding posts provide greater security Small gauge wire e g 22 gauge is acceptable for these connections be cause there is minute current flow but be sure the connections are secure and safe enough for the high voltages from the amplifier output The gain control bus in the DMC controllers is ac cessible through a two conductor 1 s inch jack on the back of the controller This feature is used when itis desired for the gain of two or more units to track Using a standard 4 inch patch cable con nect the jacks together For more than two units use Y connectors For example 1 When multiple controllers and loudspeakers are used such as in a stereo system the controller s Gain Control jacks should be con nected together to maintain level balancing and imaging 2 When the DMC 1152B DML 1152A full range system is used with
37. n the power amplifier or by monitoring the output with an oscilloscope Now turn the level down until the clip light just goes out or until the clipping dis appears on the oscilloscope Turn the LF Amplifier Calibration trimpot on the controller clockwise with a screwdriver until the LF Amplifier Output Limit LED comes on Note that the slot of the trimpot is pointed at the approximate power rating of the amplifier for an 8 ohm load as denoted by the calibrated mark ings on the front panel of the controller Note also that this is the maximum amount of power capable of being delivered to a single driver in this amplifier configuration The LF section of the controller is now calibrat ed The LF Output Level trimpot may be adjust ed as necessary for the desired frequency spectrum balance without affecting calibration Change the input test signal to a frequency of 5 000 Hz Adjust the signal source level until the high fre quency amplifier begins to clip you may turn up the HF Output Level on the controller if nec essary to get the amplifier to clip Now turn the level down until the clip light just goes out or until the clipping disappears on the oscillo Scope Turn the HF Amplifier Calibration trimpot on the controller clockwise with a screwdriver until the HF Amplifier Output Limit LED comes on Note that the slot of the trimpot is pointed at the ap proximate power rating of the amplifier for an 8 ohm load as denoted
38. proved in the rack to maintain a reasonable operating temperature The ambient temperature inside the rack cabinet should not exceed 60 C 140 F under any condi tions Security A security cover and attachment screws are sup plied to protect the control settings against uninvit ed adjustments Maintenance Use a soft damp cloth to clean the unit No other maintenance is required Installation Line Fuse MDL Series Slo Blo 0 25 A 250 V 0 25 A 250 V 0 10 A 250 V 0 10 A 250V TABLE Il Main Fuse Selection Guide page 17 THE DELTAMAX SYSTEM Figures CAO PI CN e POWER AMPLIFIER DeltaMax CONTROLLER OUTPUT ONLY ONE CHANNEL SHOWN FIGURE 7 DeltaMax Output Connection OUTPUTS SENSE INPUTS LJ DMC 11528 2 LF HE INPUT CABLE INPUTS ES QO HF LF CHANNEL CHANNEL HF LF CHANNEL CHANNEL TO DML 1152A LF FIGURE 8 interconnections for Single Channel Operation page 18 THE DELTAMAX SYSTEM Figure SENSE INPUTS OUTPUTS INPUT EE DMC 11528 GAIN CONTROL Bus GAIN SENSE INPUTS OUTPUTS INPUT CONTROL mese O O O O 97869 BUS HF LF LF PATCH a ap E SENSE LINES 4 ue LEFT RIGHT OO OO POWER E AMPLIFIER HF HF LEFT RIGHT INPUT INPUT Lj TOLEFT 2 DML 1152A HF PIN 2 TO RIGHT 0 0 DML 1152A HF tal RIGHT LEFT HF RIGHT LF OUTPUT LEFT RIGHT
39. r 22 6K 1 AW Resistor 1 50K 1 UW THE DELTAMAX SYSTEM Repair Parts List DMC 1152B Main Board Assembly continued 27 01 038255 CR55 R322 47 03 124696 Resistor 4 99K 1 R51 R55 R144 47 03 124697 Resistor 3 24K 1 YW R52 R53 47 03 124699 Resistor 1 15K 1 R90 R582 R584 47 03 124805 Resistor 7 50K 196 YW R120 R91 47 06 027344 Potentiometer 50K B K86 CC 16mm vertical R26 47 06 027459 Potentiometer 5k trimmer R204 R304 47 06 028556 Potentiometer 50k 16mm vertical R11 47 06 028818 Potentiometer 50k trimmer R266 R273 R358 R366 47 06 028910 Potentiometer 100k trimmer D1 D2 D3 D4 D5 08 09 010 011 012 013 0100 0101 0102 0103 0114 0115 0116 0117 0201 0202 0203 0204 0207 0208 0209 0210 0211 0212 0213 0215 0216 0218 0219 0220 0301 0302 0303 0304 0307 0308 0309 0310 0311 0312 0313 0315 0316 0318 0319 0320 0501 0502 0503 0504 0505 48 01 027340 Diode Signal 1N4447 D306 48 01 028163 Diode Zener 6 2V 1N5234 0525 0526 48 01 028891 Diode Zener 15V 1N4744 D222 D322 48 01 037486 Diode Zener 7 5V 1N4737D 0221 0321 48 01 028896 Diode Zener 3 9V 1N4730A SW1 51 02 028058 Switch push ON push OFF T2 T3 56 07 026392 transformer audio output page 31
40. r 32 dB of gain and that the controller is calibrated to the amplifiers see AMPLIFIER CONTROLLER CALI BRATION section Although the controller is only actually sensing one amplifier and one set of loud speakers they all are being protected equally as long as all of the amplifiers are performing identi cally For the case where the DeltaMax loudspeakers are powered by multiple amplifiers each driven at different levels and only one controller is used the sense line to that controller is connected to the out put of the amplifier that is delivering the highest power levels to the loudspeakers This is a fairly common occurrence where the levels of individual loudspeakers in an array are adjusted to provide even room coverage In this case the amplifier be ing sensed must be calibrated for 32 dB of gain and the controller is calibrated to that amplifier See AMPLIFIER CONTROLLER CALIBRATION sec tion The other amplifiers must be identical to the one being sensed with the exception that their lev els are turned down as necessary to obtain even room coverage Although the controller is actually sensing only one amplifier and one set of loud speakers they are all being protected because the one being driven the hardest is triggering the pro tection Installation Note in the last two examples where multiple ampli fiers are used to power multiple loudspeakers in an array the level setting and calibration of the amplifi ers
41. r clipping or amplifier clip ping prevention is occurring without excessive loudspeaker thermal protection or excursion pro tection larger power amplifiers should be used f excessive loudspeaker thermal protection and excursion protection is occurring more speakers should be used fexcessive overall gain reduction is occurring more speakers should be added e Ifthe 12 dB gain reduction LED is on for any sig nificant portion of time the level should be turned down Levels driven beyond this point may exceed the protection capability of the pro tection circuitry When multiple controllers are used such as in a stereo system the control voltages should be slaved together as detailed in the INSTALLATION section The gain of all of the controllers will then track whenever gain reduction occurs due to loud speaker thermal protection or amplifier clipping pre vention regardless of which loudspeaker or amplifier was exceeding its limit This will prevent acoustic image shifting at very high levels When a DMC 2181S DML 2181A subwoofer system is used with a full range DeltaMax system such as a DMC 1152B DML 1152A the control voltages should be slaved together to prevent spectral bal ance shifting at high levels when gain reduction oc curs for loudspeaker thermal protection or amplifier clipping prevention The loudspeaker excursion voltage clamping protection will still operate inde pendently in each frequency
42. requency output down to 35 Hz Optimum performance of these speakers can only be assured when used with their dedicated elec tronics Do not use with other electronic cross overs and or processors NOTE The performance of the DML 1152MC slant monitor system is identical to the DML 1152A series speaker systems Henceforth throughout this manual all references to the DML 11524 series will be assumed to include the DML 1152MC FEATURE SUMMARY Fourth order Linkwitz Riley crossover filters provide smooth accurate response through the crossover region Special equalization circuits allow flat wideband system response Sensing circuits for the drivers control the com pressor and voltage limiter to prevent voice coil overheating overexcursion and amplifier slipping without affecting spectral balance or program dynamics Dual time constant compressor circuit with variable compression ratio reduces peak and average levels for loudspeaker thermal protection and amplifier clipping prevention as necessary while preserving relative program dynamics Voltage clamp loudspeaker excursion protection does not alter overall program dynamics or fre quency response A connection to the control voltage is available through a jack on the back panel This allows precise gain tracking when more than one unit is used The front panel display shows drive signal level and compressor gain reduction Sensing display for each sense chann
43. stor 4 32K 1 AW Resistor 51 5 YW Resistor 2 21M 5 YW Resistor 3 3M 5 Resistor 75 0 1 AW Resistor 100 1 4W Resistor 221 1 Resistor 619 1 Resistor 1 00K 1 YW Resistor 1 21K 1 Resistor 2 00K 1 Resistor 2 21K 1 Resistor 2 43K 1 Resistor 2 67K 1 Resistor 3 32K 1 Resistor 3 92K 1 47 03 124672 Resistor 4 75K 1 Resistor 5 11K 5 Resistor 6 19K 1 W Resistor 10 0K 1 W Resistor 12 1K 1 YW Resistor 13 0K 1 Resistor 15 0K 1 4W R1 R8 R15 R118 R133 R136 R142 R226 R248 R327 R347 R148 R93 R94 R122 R123 R21 R27 R28 R29 R223 R228 R323 R579 R580 R581 R229 R230 R31 R32 R217 R317 R247 R23 R19 R365 R36 R40 R156 R218 R220 R269 R315 R318 R320 R360 R504 R505 R245 R246 R344 R33 R34 R35 R38 R215 R241 R330 R341 R260 R515 R537 R540 R231 R272 R503 R363 R54 R58 R96 R157 R57 R59 R60 R151 R240 R340 R155 R359 R150 R267 R12 R544 R263 R508 R232 R233 R362 R524 R100 R591 R234 R261 R262 R124 R264 R239 R339 R516 R99 R590 47 03 109434 47 03 124930 47 01 102111 47 03 027330 47 03 124615 47 03 028260 47 03 124659 47 03 038076 47 03 119034 47 03 028245 47 01 109298 47 03 119305 47 03 038216 47 03 026892 47 03 038217 47 03 037771 47 03 026839 47 03 037661 47 01 102132 47 03 123011 47 03 038224 47 03
44. the DMC 2181S DML 2181A subwoofer system the controller s Gain Control jacks should be connected togeth er between the two controllers to ensure flat frequency response when the controllers are operating in the protection mode Loudspeaker Connections The DML 1152A speaker system is equipped with 4 pin Neutrik Speakon NLAMPR connectors for electrical connection to the woofer and compres sion drivers Each cabinet has two identical con nectors with parallel wiring for connecting additional DML speaker systems One mating Neutrik Installation Speakon NL4FC cable end connector is supplied with each system Cables connectors and wiring accessories are available for the DML speaker systems from Pro Co Sound Inc and Whirlwind Music Distributors Inc To find your local Pro Co Whirlwind or Neutrik dealer contact Pro Co Sound Inc 135 E Kalamazoo Ave Kalamazoo MI 49007 Whirlwind Music Distributors Inc P O Box 1075 Rochester NY 14603 Neutrik USA Inc 195 S3 Lehigh Ave Lakewood NJ 08701 The pin connections are as follows Pin 1 LF Pin 1 4 LF Pin 2 HF Pin 2 HF Both the low frequency and high frequency inputs present a nominal eight ohm load to the amplifier however the compression driver has a low fre quency protection capacitor in series Multiple Loudspeaker Arrays Arrays consisting of multiples of identical DeltaMax loudspeaker systems can be imple mented
45. troller by removing the two screws on the front panel of the controller Perform the following procedure 1 Connect the controller to the low and high fre quency power amplifier channels as detailed in the INSTALLATION section 2 Besure the controller LF and HF Sense Inputs are connected to the correct amplifier outputs and the speakers are disconnected from the amplifier 3 Setthe low and high frequency amplifier gain controls for 32 dB voltage gain or as close as possible to 32 dB this is optimum but it can be in the range of 27 to 35 dB See the AMPLI FIER CALIBRATION PROCEDURE section 4 Tum the LF and HF Amplifier Calibration trimpots on the controller to full counterclock wise Press the Cal Clip Limit switch to its re cessed Cal Clip position with a screwdriver or other suitable tool 5 In order to prevent thermal limiting from occur ring while calibrating the amplifier limit levels insert a shorted 4 inch phone plug tip sleeve 10 13 Amplifier Controller Calibration into the Gain control bus jack on the back of the controller The Thermal Limit LED may still come on but no gain reduction should be indi cated Send a 500 Hz sinewave test signal to the con troller input Adjust the signal source level until the low frequency amplifier begins to clip you may turn up the LF Output Level on the controller if necessary to get the amplifier to clip Clipping is noted by the clip indicator o
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