Electro-Voice DML-1122A User's Manual
Contents
1. 5 dB SPL 1 meter using typical music frequency spectrum HORIZONTAL 16 kHe VERTICAL FIGURE 2 DML 1122A DMC 1122A Polar Response s octave pink noise 4 volts at 20 feet PCUNOS aes oe ENCLOSURE WILL FAIL PALLY THE TOTAL van THE COLUMN OF SPEAKER STEWS EXCEEDS E 750 POUNDS BEAMWIDTH IN DEGREES 6 dB ANGLE OF PULL DEGREES O FREQUENCY He 6a Break Strength Rating of Each 6b Break Strength Rating ot FIGURE 3 DML 1 122A DMC 1122A individual Rigging Paint Overal Enciosure Beamwidth vs Frequency FIGURE 6 DML 1122APF and DML 1122ACF Whole Space anechoic Ulitimate Break Strength Ratings Front panel indicator lights show input level compressor gain reduction and HF and LF Output limit thresholds for excursion temperature and amplifier power Operation of all protection functions is completely automatic The DeltaMax system will work with any professional power amplifier within the stated power and gain range See Amplifier Requirements section The DMC 1122A and DMC 1152A controllers are designed to be used only with the Electro Voice DML 1122 and DML 1152 speaker systems respectively Do not use with any other speakers PRINCIPLE OF OPERATION Refer to the block diagram in Figure 5 The signa path consists of an active differen tial input circuit which drives a VCA which is controlled by a special compressor circuit After the VCA is a fourth order Linkw2. TO BE USED WITH DMC 1122A ELECTRONIC CONTROLLER SPECIFICATIONS Frequency Response Measured in Far Field 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 1 67 20 000 Hz Crossover Frequency 1 250 Hz Efficiency LF HF 4 5 25 Long Term Average Power Handling Capacity Per EIA Standard RS 426A see Power Handling section LF HF 300 75 watts Short Term Power Handling Capacity 10 milliseconds LF HF 1 200 300 watts Maximum Long Term Midband Acoustic Output LF HF 13 5 18 8 watts Sound Pressure Level at One Meter One Watt Input Power Anechoic Environment Band Limited Pink Noise Signal LF HF 98 110 dB Typical System Maximum Sound Pressure Level at One Meter Anechoic Environment Continuous Beamwidth Angle Included by 6 dB Down Points on Polar Responses for One Third Octave Bands of Pink Noise 1 000 20 000 Hz Horizontal see Figure 3 80 25 20 3 800 20 000 Hz Vertical see Figure 3 55 25 5 Directivity Factor R Q 1 000 20 000 Hz Median see Figure 4 10 6 9 3 4 0 Directivity Index D 1 000 20 000 Hz Median see Figure 4 98 dB 32 dB 1 6 dB Distortion 115 dB SPL at One Meter Shaped Spectrum see Figure 5 Second Harmonic 100 Hz 4 5 800 Hz 0 8 2 000 Hz 0 7 5 000 Hz 1 6 Third Harmonic 100 Hz 0 800 Hz 2 000 Hz 0 5 000 Hz 1 6 Transducer Complem
3. e however the full power capabilities of the DML speakers wil not be realized The use of amplifiers with significantly higher power ratings is wasieful and may endanger the loudspeakers it is generally not recommended Under certain circumstances higher rated power amplifiers are acceptable It is acceptable to drive either the DML 1122 or DML 1152 speakers with a stereo power amp ulllizing one chan nel to drive the low frequencies and the other channel to drive the high frequencies CONNECTIONS The DeltaMax controller has XLR type con nectors for signal input and outputs Pin 1 is shield pin 2 is high and pin 3 is low The LF and HF sense connections are binding post banana jacks The DML 1122 and DML 1152 loudspeaker systems are equipped with ITT Cannon EP 4 connectors Each cabinet has two connec tors one male EP 4 14 for input signal and one female EP 4 13 for paralleling additional DML loudspeakers The mating connectors for the cable ends are the EP 4 11 IC for the input connection and the EP 4 12 IC for the parallel connection The pin connections are as follows Pin 1 LF Pin 2 LF Pin 3 HF Pin 4 HF NOTE DML 1122 speakers may be paralleled with other DML 1122 speakers if the amplifier is capable of delivering adequate power at the lower impedance The same holds true for the DML 1152 speaker systems ARCHITECTS AND ENGINEERS SPECIFICATIONS The controller shall con
4. e or its authorized service agencies will void this guarantee A list of authorized service centers is available from Electro Voice Inc 600 Cecil Street Buchanan MI 49107 AC 616 695 6831 Electro Voice Inc 3810 148th Avenue N E Redmond WA 98052 AC 206 881 9555 and or Electro Voice West 8234 Doe Avenue Visalia CA 93291 AC 209 651 7777 This warranty gives you specific lega rights and you may also have other rights which vary from state to state Service and repair address for this product Electro Voice Inc 3810 148th Avenue N E Redmond WA 98052 Specifications subject to change without notice ELECTRO VOICE INC 600 Cecil Street Buchanan Michigan 49107 MANUFACTURING PLANTS AT B BUCHANAN Mi Ml NEWPORT TN E SEVIERVILLE TN E REDMOND WA E GANANOQUE ONT Electro Voice inc 1989 Litho In U S A MARK IV Form 2884A
5. ent HF DH1A HP ty LF DL12X variant woofer Impedance Nominal LF HF 8 0 8 0 ohms Minimum LF HF 8 4 6 0 ohms Recommended Amplifier Power see Amplifier Requirements section HF 125 250 watts LF 300 600 watts Input Connections Neutrik Speakon NL4MP R Enclosure Materials Structural 73 inch 14 ply birch plywood Finish DML 1122AP and DML 1122APF Black textured paint DML 1122AC and DML 1122ACF Black carpet covered Electro Voice a MARK IV company ot ETE it Ae VARA BA FREQUENCY te re FIGURE 1 OML 1122A DMC 1122A Axial Frequency Response 1 watt 1 meter into LF midband DML 1122A Series rip Two Way Full Electronically Coniroled Sound Rearmed System Grille Hang ng DML 11 1 22APF and DML TIEERGF only w 2 a Stand Mount Socket DML 1122AC a DML 1122ACF on Dimensions Height 58 4 cm 23 Width 37 1 cm 14 6 Depth 35 6 Net Weight 4 T x were designed as an mtearal package tc ma Hil N T a SPECIFIC Re VALUES oo Bl oe FREQUENCY Oy EAT FIGURE 4 DML 1122A DMC 1122A Directivity Factor and Directivity Index vs Frequency Whole Space anechoic DIRECTIVITY FACTOR Re Q DIRECTIVITY INDEX D d8 aT T __ Shaped 10 renact typical COMIC Ath U A AV T Be lll M NITRA feer is f Swi X Wi Ce em HH BEY Oat T N i WARNTE M A s l iS z 4 FREQUENCY IN HERTS FIGURE 5 DML 1122A DMC 1122A Harmonic Distortion 11
6. itz Riley crossover circuit The high frequency output has an equalizer which flattens the frequency response of the constant directivity horn and compression driver from their natural mass loaded response characteristic The low frequency output has a delay equalizer to compensate for the relative physica positioning of the LF and HF drivers and their actual phase response at the crossover frequency An underdamped second order high pass filter combined with a variation of a first order shelving low boost function provides optimum low frequency response with the DeltaMax loudspeakers The output sections provide transformer isolated low distortion Gifferential drive signals The compressor has both a signal control input and a compression ratio contro input The control voltages are developed from the sense channeis The primary dynamic action gain reduction of the compressor is controlled by a dualtime constant detection circuit driven by rectified audio sensed at the speaker terminals The compression ratio above the threshold is determined by the condition of the speakers Temperature modeling circuits will increase this compression ratio when it becomes necessary Also compression will increase to prevent amplifier clipping when this function iS Selected The compressor gain transfer has a gradually changing slope across its threshold This sofi knee design reduces the audibility of the compression The compression
7. ratio above the threshold can vary from 1 1 no effect to about 20 1 hard limiting INSTALLATION Mounting The unit is one rack space high 4 5 cm 1 75 in and fits a standard EIA 19 inch rack Mount the DMC controller in a rack cabinet near the power amplifier s to make wiring easy 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 grounding system is recommended as a starting point Never lift the third wire safety ground of the ac power cable It protects against possible shock hazard Ventilation Adequate ventilation shouid be provided in the rack to maintain a reasonable operating temperature Under any conditions the ambient temperature inside the rack cabinet should not exceed 60 C 140 F Security A security cover and attachment screws are supplied to protect the contro settings against uninvited adjustments AMPLIFIER REQUIREMENTS The DML 1122 and DML 1152 speaker systems require professional power amplifiers with the following ratings DML 1122 LF 300 600 watts continuous into eight ohms HF 125 250 watts continuous into eight ohms DML 1152 LF 400 800 watts continuous into eight ohms HF 125 250 watts continuous into eight ohms The use of amplifiers with lower power rating is acceptabl
8. sist of a single channel two way crossover circuit with fourth order Linkwitz Riley filters a compressor system with variable compression ratio and dual time constant detector a voltage clamp ing circuit for excursion protection and speaker modeling circuits which control the compressor and clamp circuits to prevent destruction of the high frequency and low frequency drivers due to excessive drive level Included in the signal path shall be special frequency and time delay equalization to provide flat 3 dB on axis anechoic fre quency response in the range of 50 Hz to 20 kHz for the DML 1152 loudspeaker and 70 Hz to 20 kHz for the DML 1122 loudspeaker The total harmonic distortion through tne signal path shall be nominally 0 03 and no greater than 0 1 from 20 Hz to 20 kHz within the output s passband The noise at the outputs measured with a 20 20 000 Hz equivalent noise bandwith filter shall be typically 86 dBu The signal input shall be active differental with a level capability of 18 dBu and a female 3 pin XLR type connector The outputs shall be transformer isolated with a level capability of 18 dBu into 600 ohms and male 3 pin XLR type connectors There shall be two active diffential sense inputs for speaker protection with binding post banana jack connectors Front panel controls shall include LF and HF level controls LF and HF amplifier calibration controls and a switch to control the amplifier limit f
9. unction all accessible with a screw driver after removing the security cover There shall be a power switch on the front pane Front panel indicators shail include input level gain reduction LF output limits for amplifier excursion and temperature HF output limits for amplifier excursion and temperature and power on The chassis shall be made of painted steel with a gray front panel and white graphics It shall be rack mountable in a 19 inch EIA rack and be 4 45 cm 1 75 in high and 21 4 cm 8 4 in deep excluding connec tors The unit shall weigh 3 6 kg 8 lb The unit shall be an Electro Voice DMC 1122A Electro Voice DMC 1152A WARRANTY Limited Electro Voice Professional Sound Reinforce ment Electronic Components are guaranteed for two years from date of original purchase against malfunction due to defects in workmanship and materials If such malfunc tion occurs unit will be repaired or replaced at our option without charge for materials or labor if delivered prepaid to the proper Electro Voice service facility Unit will be returned prepaid Warranty does not extend to finish appearance items or malfunction due to abuse or operation under other than specified conditions nor does it extend to incidental or consequential damages Some states do not allow the exclusion or limitation of incidental or consequential damages so the above exclusion may not apply to you Repair by other than Electro Voic
Download Pdf Manuals
Related Search