Electro-Voice DMC-1152X User's Manual
Contents
1. ane cre DMC 1152X DeltaMax Controller for DMS 1152 64 Series Sound Reinforcement Speaker system Fixed optimized system equalization and signal delay for smooth frequency response Active sensing broadband compressor circuit with varying compression ratio provides speaker thermal protection Active speaker overexcursion protection with soft clip limiting User adjustable power amplifier clip calibration circuitry LED displays for each band indicate protection mode e Variable low frequency shelving EQ controls bass buildup of units High current output drives many paralleled power amplifiers Description The DeltaMax system consists of a two way biamped high performance speaker system and a companion electronic control ler The electronic protection technology in the DMC 1152X DeltaMax controller al lows the loudspeakers to be operated at full capacity with maximum fidelity and reliabil ity The DMS 1152 64 is a compact full range loudspeaker system intended for high level sound reinforcement in touring sound and permanent installations The electronic circuits are designed to pro vide optimum audio performance even when the audio drive level is increased for maxi mum loudness A high performance com pressor with automatically variable com pression ratio is controlled by special speaker modeling circuits to provide speaker temperatur2. Maximum Level 145 volts rms Impedance 200 000 ohms differentia Connector Two binding posts banana jacks spaced 19 mm 0 75 in Controls all except power switch are screwdriver operated Output level each output ampli fier limit calibration each sense channel amplifier clip limit switch LF shelving power switch Indicators Three LED input level 20 0 and 16 dBu Three LED gain reduction 3 6 and 12 dB Three LED LF output limits amplifier excursion temperature Three LED HF output limits amplifier excursion temperature One LED power on Power Requirement 100 120 220 or 240 volts ac 50 60 Hz 13 watts Chassis Construction Painted steel Color Gray front panel and black chassis with white graphics Mounting and Overall Dimensions see Figure 4 EIA 483 mm 19 in rack mount 44 5 mm 1 75 in high 228 mm 8 97 in behind panel including connectors supplied with front panel security cover for controls Weight Net 3 2 kg 7 1b Shipping 4 2 kg 9 Ib 3 191031007 XZSI OWA wiXPWeieq pet f aiaa ae Doai a at Pat ome 7 152X Controller data sheet owner s manual beginning with the date of onginal purchase If such malfunction occurs during the specified pe riod the product will be repaired or replaced at Our option without charge The product will be
3. amplifier is capable of delivering adequate power to each speaker at the lower im pedance Under no circumstances should DMS 1122 85 and DMS 1152 64 speakers be paralleled on the same amplifier channels Architects And Engineers Specifications The controller shall consist of a single chan nel 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 de struction of the high frequency and low fre quency drivers due to excessive drive level without shifting high pass low pass or cross over filters Included in the signal path shall be special frequency and signal delay equal ization to provide flat 3 dB on axis anechoic frequency response in the range of 50 Hz to 20 kHz for the DMS 1152 64 se ries loudspeakers The total harmonic distortion through the signal path shall be nominally 0 03 and no greater than 0 1 from 20 Hz to 20 kHz within the output s pass band The noise at the outputs measured with a 20 to 20 000 Hz equivalent noise bandwith filter shall be typically 86 dBu The signal input shall be active differential with a level capability of 18 dBu and havea female 3 pin XLR type connector The out puts shall be electronically balanced with a level capability
4. five way binding posts The sense inputs are active differen tial enabling connection to the output of mono bridged amplifiers and are high im pedance allowing small gauge wire e g 22 AWG to be used for the sense connec Although current flow in the sense lines is negligible they must be capable of han dling the high output voltages of the ampli fiers Amplifier Requirements The DMS 1152 64 speaker system requires professional power amplifiers with the following ratings LF 600 1200 watts continuous into 8 ohms HF 125 250 watts continuous into 8 ohms The use of amplifiers with lower power rat ings is acceptable however the full power capabilities of the DMS speakers will not be realized The use of amplifiers with signifi cantly higher power ratings is wasteful and may endanger the loudspeakers it is gener ally not recommended Under certain circumstances however higher rated power amplifiers are acceptable It is acceptable to drive the DMS 1152 64 speaker with a stereo power amp utilizing one chan nel to drive the low frequencies and the other channel to drive the high frequencies For an extra degree of protection when operat ing 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 com pression driver DMS 1152 64 speakers may be paralleled with other DMS 1152 64 speakers if the
5. limit the peak of the output waveform is clamped at a level above which excursion damage would occur Installation Mounting The unit is rack space high 44 5 mm 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 How ever 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 should be provided in the rack to maintain a reasonable operating temperature Under any conditions the am bient temperature inside the rack cabinet should not exceed 60 C 140 F Security A security cover and attachment screws are supplied to protect the control settings against uninvited adjustments Connections The DeltaMax controller has XLR type connectors for signal input and outputs Pin 1 is shield pin 2 is high and pin 3 is low The input is active differential and the Outputs are electronically balanced When used in an unbalanced configuration pin 3 should be shorted to ground The LF and HF sense connections are dual binding post banana jacks
6. returned to the customer prepaid Exclusions and Limitations The Limited Warranty does not apply to a exterior fin ish or appearance b certain specific items described in the individual product line Statement s below or in the individual prod uct data sheet or owner s manual mal function resulting from use or operation of the product other than as specified in the product data sheet owner s manual d 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 Mark IV Audio Service or any of its authorized ser vice representatives Obtaining Warranty Service To obtain warranty service a cus tomer must deliver the product prepaid to Mark IV Audio Service or any of its autho rized service representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice A list of authorized service representatives is available from Mark IV Audio Service at 600 Cecil Street Buchanan MI 49107 800 234 6831 or FAX 616 695 4743 In cidental and Consequential Damages Ex cluded 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 consequen tial damages including without limitation injury to persons or property or loss of use Some states do not allow the exclusion
7. ction provides optimum low frequency response with the DeltaMax loudspeakers Figure 1 shows the combined response of the DMC 1152X controller and the DMS 1152 64 speaker system Figure 2 shows the response of the controller alone The output sections provide electronically balanced low distortion differential drive signals The compressor has both a signal control input and a compression ratio control input The contro voltages are developed from the sense channels The primary dynamic ac tion gain reduction of the compressor is controlled by a dual time constant detection circuit driven by rectified audio sensed at the speaker terminals The compression ratio above the threshold is determined by the con dition of the speakers Temperature model ing circuits will increase this compression ratio when it becomes necessary Compres sion will also increase to prevent amplifier clipping if this function is selected The compressor gain transfer has a gradu ally changing slope across its threshold This soit knee design reduces the audibility of the compression The compression ratio above the threshold can vary from 1 1 no effect to about 20 1 hard limiting A dynamic frequency sensitive voltage lim iter at the output of each frequency band pro 1 15ZA Controller VeltaMax DeltaMax DMC 1 152X Controller tects the speakers from excursion damage If one of the speakers approaches its excur sion
8. e protection and amplifier anticlip limiting Speaker excursion protection is accomplished with a voltage limit system which operates from an excursion versus fre quency modeling circuit Front panel indi cator lights show input level compressor gain reduction and HF and LF output limit thresholds for excursion temperature am plifier power Operation of all protection functions is completely automatic Variable low frequency shelving equalization is avail able to control the bass buildup of multiple units used in arrays The DeltaMax system will work with any professional power amplifier within the stated power and gain range See Amplifier Requirements section Principle Of Operation Refer to the block diagram in Figure 3 The signal path consists of an active differ ential input circuit which drives which is controlled by a special compressor circuit After the VCA is a fourth order Linkwitz 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 re sponse characteristic The low frequency output has a delay equal izer to compensate for the relative physical 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 fun
9. mensions 445 17 5 228 8 97 2 8 19 3 18 j 0 13 in gt 4 83 19 0 TIRE
10. of 18 dBu into 600 ohms and male 3 pin XLR type connectors There shall be two active differential sense inputs for speaker protection with binding posv ba nana jack connectors Front panel controls shall include LF and HF level controls LF and HF amplifier calibra tion controls a variable LF shelving control to compensate for a bass buildup of multiple arrayed speakers and a switch to control the amplifier limit function all accessible with a screwdriver after removing the security cover There shall be a power switch on the front panel Front panel indicators shall 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 483 mm 19 inch EIA rack and be 44 5 mm 1 75 in high and 228 mm 8 97 in deep overall in cluding connectors The unit shall weigh 3 2 kg 7 Ib The unit shall be an Elec tro Voice DMC 1152X Uniform Limited Warranty Electro Voice products are guaranteed against malfunction due to defects in mate rials or workmanship for a specified period as noted in the individual product line statement s below or in the individual prod DeltaMax DMC 1 152X Controller System Specifications System Frequency Response DMC 1152X with DMS 1152 64 Serie
11. or limitation of incidental or consequential damages so the above limitation or exclu sion may not apply to you Other Rights This warranty gives you specific legal nghts and you may also have other nghts which vary from state to state Electro Voice Electronics are guaranteed against malfunction due to defects in mate rials or workmanship for a period of three 3 years from the date of original purchase Additional details are included in the Uni form Limited Warranty statement Figure 1 DMS 1152 64 Frequency Response with DMC 1152X controller 110 SPL dB 8 y 20 30 50 100 200 500 U EE TT EI TOENE PRR ATHAIS lin AHU EE ELE EET ELT EEE EET 10K 20K FREQUENCY IN A 7 ACILI JAVNOG wins DeltaMax DMC 1152X Controller DeltaMax DMC 1 152X Controller CLOUET T A TTN P TT TT N PU ET PUT TT AAT oo UT TT TT EAT A T A oot LAU TT TA 20 30 50 100 200 500 1K 2K 5K 10K 20 FREQUENCY IN HERTZ Figure 2 DMC 1152X Frequency Response RESPONSE dB K Figure 3 DMC 1152X Block Diagram Oct Re Ot fit V i Figure 4 1152 Di
12. s Speaker One Watt into LF Mid Band 2 83 volts at 250 Hz on Axis in Anechoic Environment see Figure 1 50 20 000 Hz 3 dB Controller Specifications General Functions Two way crossover frequency and signal delay equalizer and protec tion system for DMS 1152 64 series speaker system Channel Configuration Single channel two way two sense channels LF and HF Crossover Frequency 1 480 Hz Crossover Filter 4th order Linkwitz Riley Gain 5 dB nominal LF and HF outputs Signal Path Equalization DMC 1152X see Figure 2 LF EQ 2 dB at 33 Hz 2 dB at 55 Hz LF Signal Delay 0 49 ms at crossover frequency HF EQ 4th order optimized for DMS 1152 64 series HF driver and hom Total Harmonic Distortion 20 20 000 Hz 0 03 typical 0 1 maximum l See DMS 1152 64 series engineering data Sheet for detailed speaker system specifications 0 dBu is 0 775 volts rms sine wave Noise Each Output 20 to 20 000 Hz Bandwidth Typical 86 dBu Signal Input Type Active differential Maximum Level 18 dBu Impedance 20 000 ohms and 0 0015 uf Common Mode Range 24 volts CMRR Typical 55 dB Connector Female 3 pin XLR type Signal Outputs LF and HF Type Electronically balanced Maximum Level 18 dBu Minimum Load Impedance for Full Level 600 ohms Protection Sate for short circuit or 25 volts de Connectors Male 3 pin XLR type Sense Channel Inputs LF and HF Type Active differential
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