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Electro-Voice” THE DELTAMAX™ SYSTEM OWNER'S MANUAL DMC 1152B CONTROLLER DML-1152A/DML-1152MC LOUDSPEAKERS THE DELTAMAX™ SYSTEM Description DESCRIPTION GENERAL and the DMC-2181 series electronic controllers The DeltaMax™ DMC-1152B/DML-1152A 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 DML1152A 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 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-1152A or the DMC-1152B/DML-1152MC combinations. The DML-2181A loudspeaker cabi- net, with two manifolded eighteen-inch speakers, were designed specifically to work in conjunction with the two-way systems to provide extremely high-level low-frequency 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-1152A 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 channel 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: Connector: Monoaural two-way; two sense channels Female 3-pin XLR-type FILTER TYPE: SENSE CHANNEL INPUTS, 4th-order Linkwitz-Riley pe: CROSSOVER FREQUENCY: Floating differential 1,100 Hz Maximum Level, GAIN: LF: 145V rms 5 dB nominal HF: 145 V rms SIGNAL PATH EQUALIZATION (see Figure 1), Impedance: LF EQ: 100 kilohms each side to ground -3 dB at 33 Hz, +10 dB at 55 Hz Connector: LF Signal Delay: Two five-way binding posts 0.49 ms at crossover frequency OUTPUTS (LF and HF): HF EQ: Type: 4th order optimized for DML-1152A series Transformer floating differential HF driver and horn Maximum Level: TOTAL HARMONIC DISTORTION, 20 - 20,000 Hz: +18 dBu 0.03% typical, 0.1% maximum Minimum Load Impedance for Full Level: NOISE, EACH OUTPUT, 20 - 20,000 Hz NBW, 600 ohms TYPICAL: Connectors: -86 dBu Male 3-pin XLR-type SIGNAL INPUT, POWER REQUIREMENTS: Type: 100, 120, 220, 240 V ac, 50 - 60 Hz, 13 W Electronically balanced differential CHASSIS CONSTRUCTION: Maximum Level: Painted steel +18 dBu COLORS: Impedance: Gray front panel/black chassis with white graphics 27,000 ohms and .0015mf MOUNTING: CMAR, Typical: EIA 19-inch rack mount, 1.75 in. high, 8.97 in. 55 de behind panel (including connectors); supplied ESTOS ES AL OLAS AS SANDS A AU LS MAA CA AAN EEN SYSTEM SPECIFICATIONS with front-panel security cover for controls. Frequency Response, Measured in Farfield, Calculated to One Meter on Axis, Swept One-Third- Octave Pink Noise, One Watt into LF Midband (2.83 Y at 250 Hz), Anecholc 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, Anecholc 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 (+12.8, -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 at 1 Meter, Shaped Spectrum (see Figure 6), Second Harmonic 100 Hz: 4.3% 800 Hz: 1.0% 2,000 Hz: 0.7% 5,000 Hz: 1.5% Third Harmonic 100 Hz: 0.7% 800 Hz: 1.4% 2,000 Hz: 0.7% 5,000 Hz: 1.7% THE DELTAMAX™ SYSTEM Specifications SPEAKER SPECIFICATIONS Transducer Complement, Minimum Impedance, High Frequency: High Frequency: DH1A compression driver (2-inch exit) 6.5 ohms Low Frequency: Low Frequency: DL15X 15-inch woofer 7.9 ohms Efficiency, Dimensions, High Frequency: Height: 25% 75.9 em (29.88 in.) Low Frequency: Width: 5.0% 45.2 cm (17.78 in.) Long-Term Average Power Handling Capacity, Depth: High Frequency (per AES2-1984): 41.4 cm (16.28 in.) 75 watts . Low Frequency (per EIA RS-426A): jy O8 400 watts Short-Term Power Handling Capacity, ee OR High Frequency: re 300 watts Enclosure Materials, Low Frequency: Structural: 1,600 watts 3/4-inch 14-ply birch plywood Finish: ELE Midband Acoustic Output, inch iene pei 18.8 watts Grille: 20.0 watts Hanging (DML-1152APF only): Nominal Impedance, 3-point flying system (accepts Aeroquip 32326 and High Frequency: 32343 fittings) 8 ohms Low Frequency: 8 ohms +20 + RESPONSE IN dB = w ba Ц == feel roo FD 000 "oo roc FREQUENCY IN HEATZ FIGURE 1 - DMC-1152B Frequency Response SPL in dB FREQUENCY IM HERTZ FIGURE 2 - DMC-1152B/DML-1152A Axial Frequency Response (1 watt/1 meter Into LF midband) page 3 Figures THE DELTAMAX™ SYSTEM 800 Hz VERTICAL ———— 5 dB per division HORIZONTAL FIGURE 3 - DMC-1152B/DML-1152A Polar Response (!/s-octave pink noise, 4 voits at 20 feet) THE DELTAMAX™ SYSTEM Figures 5 dE per division FIGURE 3 (continued) - DMC-1152B/DML-1152A Polar Response ota ("/3-octave pink noise, 4 volts at 20 feet) VERTICAL ———-— THE DELTAMAX™ SYSTEM Figures © © > = e NUMBERS INDICATE ó м a SPECIFIC Rg VALUES TE + 20 8 2 Pret tue” a uu E a ua. a Е <L Ras = o > erario > o = = Zn = 2 © = = I O 0 = = x = 5 a = HORIZONTAL © FO = VERTICAL A FREQUENCY IN HERTZ o 100 200 500 1000 2000 5000 19000 20000 FREQUENCY [Hz] 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) FUNDAMENTAL (Shaped to refiect typical music frequency spectrum) NA 3rd HARMONIC LEVEL IN dB 3rd HARMONIC mm mn a pe x se Ч sec oo 15008 Toon FREQUENCY IN HERTZ FIGURE 6 - DMC-1152B/DML-1152A Harmonic Distortion (120 dB SPL/1 meter using typical music frequency spectrum) page 6 = —" -— 2" THE DELTAMAX™ SYSTEM Operation 1 2 3 5 6 78 4 | | HH o & |= | „===. Fiche [| heir Но © “EE 0% 33 Em Oo м = i u pe “m OMC-1 1828 o PICTORIAL 1 — DMC-1152B Front Panel Diagram OPERATION 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-temperature limits will not be exceeded for either the woofer or compression driver. В. 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 of the speakers. page 8 THE DELTAMAX™ SYSTEM 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 compressor/ 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. Operation 7. POWER INDICATOR: 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 À 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. 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. | Го}. ©| a PICTORIAL 2 — DMC-1152B Back Panel Diagram page 9 THE DELTAMAX™ SYSTEM OPERATION (continued) 5. GAIN CONTROL BUS: This /s-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, pin 2 high (+) and pin 3 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-coil 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 same 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 set up. 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 Operation +18 dBu (6.2 volts rms) input signal. The input- signal level display has three LED's calibrated to —20, 0 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- quency-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 page 10 THE DELTAMAX™ SYSTEM OPERATION (continued) has three LED's to indicate loudspeaker thermal- protection 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: * [f 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. о |f 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 * |f excessive amplifier 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. о |f excessive overall gain reduction is occurring, more speakers should be added. * [f the 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 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 amplifier. 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 volis 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 controller 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. Be sure the controller LF and HF Sense Inputs are connected to the correct amplifier outputs and the speakers are disconnected from the amplifier. 3. Set the 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 tr rmpots on the controller to full counterciock- 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 1/4-inch phone plug (tip-sleeve) 10. 11. 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 on 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 tum 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 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 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 '/-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 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. If two 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. Amplifier/Controller Calibration/Installation D. Do not change the amplifier gain, or recalibration will be necessary. Use the LF and HF Output Level controls on the 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 channel! 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. 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 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 ‘/s-inch jack on the back of the controller. This feature is used when it is desired for the gain of two or more units to track. Using a standard ‘/s-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 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™ NL4MPR 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 —_— -——— re —— rT a 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. Р.О. Вох 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 + = LF (+) Рт 2 - = НЕ (-) 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 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, a DMC-2181S/DML-2181A subwoofer system may be added to a DMC-1152B/DML-1152A sys- tem. The DMC-2181S 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 DMC-2181S control- ler and one DMC-1152B controller; a stereo pro- gram source requires one DMC-21815 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 of 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. (Altemative- ly, multiple DMC controllers with paralieled 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 for 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 are critical to ensure that all of the loudspeakers 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 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 fiying version of the DML-1152AP. Each cabinet has a total of six steel- reinforced aircrafi-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 the 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 controller's 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). 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. Install the correct line fuse. See values in Table Il. 5. Plug the power cord into an ac outlet and tum 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 10% of this value, turn the unit off and check the connections in step 3. 6. Reinstall the top cover with the seven screws. Mounting The unit is one rack-space high (1/4 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. > 100 VAC PRIMARY WIRING Г y СГ = == VE >< A FH O Г 120 VAC PRIMARY WIRING Ч OTN ES ha 01 9 a= (J TABLE | Primary Power Conversion Chart for 100-, 120-, 220- and 240-V, 50/60-Hz Operation 220 VAC FRIMARY WIRING 1 Мей A —— LA z——— as, va SWITCH a 240 VAC PRIMARY WIRING Ц \_J LJ | = ee - > mio ОВ” HE page 16 Ca THE DELTAMAX™ SYSTEM Installation INSTALLATION (continued) Line Fuse, When deciding how to best ground the controller in MDL Series a particular system, note that the controller's input Line Voltage Slo-Blo and output XLR-type connectors have pin 1 refer- enced to chassis ground through a 20 k resistor 100 \ ас 0.25 A/250 V and a .O1uF capacitor. This minimizes the possibil- 120 V ac 0.25 A/250 V ity of a ground loop. Circuit ground ties to the chas- sis ground internally at one point. The input to the 220 V ac 0.10 A/250 V controller is active differential and the output is transformer isolated. OV uc 9.10 A/250V Ventilation TABLE Adequate ventilation should be 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. Main Fuse Selection Guide page 17 THE DELTAMAX™ SYSTEM Figures TO DML-1152A LF J J 2 + IN Par" Ру — IN So: hina сек aha li Ca POWER GND AMPLIFIER DeltaMax™ CONTROLLER OUTPUT (ONLY ONE CHANNEL SHOWN) CO FIGURE 7 - DeltaMax™ Output Connection GAIN CONTROL BUS SENSE INPUTS OUTPUTS & INPUT E) mes 00 00 MORO HE LF HF LF RE Seats INPUT CABLE CABLE CABLE OUTPUTS. INPUTS = + - + POWER OO OO AMPLIFIER (5 @ HF LF HF LF CHANNEL CHANNEL CHANNEL CHANNEL ! + 1 + la! N + - = т = = a a a a TO DML-1152A HF FIGURE 8 - interconnections for Single Channel Operation page 18 Bi ns THE DELTAMAX™ SYSTEM Figure FIGURE 9 - Interconnection for Stereo Operation GAIN CONTROL BUS SENSE INPUTS OUTPUTS о (>) DMC-11528 OO OO HF LF HF LF | RIGHT INPUT GAIN CONTROL BUS San SENSE INPUTS OUTPUTS E CONTROL e) DMC-11528 00100 e BUS HF = HE LF PATCH CABLE LEFT INPUT SENSE LINES | ili. UTE ' LEFT RIGHT - + — + HF оО оо POWER 65 © AMPLIFIER НЕ НЕ LEFT RIGHT INPUT INPUT I + I + Cu Cu au od TO LEFT = zz > DML-1152A HF à à a. = LL TI = — u TO RIGHT fox = DML-1152A HF 51 ti 5] © = El 51 =] 4 OUTPUT ji = 14 LF LEFT RIGHT OO OO POWER 65 AMPLIFIER LE = LEFT RIGHT INPUT INPUT i + | + TO LEFT = == = DML-1152A LF & CR an TO RIGHT DML-1152A LF | Ш X THE DELTAMAX™ SYSTEM Assembly View of P.C. Board POWER SUPPLY P.C. BOARD — Ш O, O F1 | 2 iy e | Г ся; | & o_O Os Os Os O page 20 E A E ms a A BT 55 THE DELTAMAX™ SYSTEM Assembly View of P.C. Board MAIN P.C. BOARD oo LEO Tl A 0 бен’ НЫ) page 21 Schematic dwt el ud 405 par dnp et dwt Mw a ww 1316 24 MT 7 7 1 SCHEMATIC - DMC-1152B / Page 1 of 6 THE DELTAMAX™ SYSTEM off PE Ewe Schematic THE DELTAMAX™ SYSTEM SCHEMATIC - DMC-1152B / Page 2 of 6 ta" area [a хи » к de % Ser wy и a ñ % LEAT] HEEE il I ~~ в db EE > Cale tes ed ee “ez waz ee au Mi #1 WEEN Ea = | MIFE == Ar gg CE | Tim ак Ав Ен Aja y a <a = Eis= i ME JANE 1618 1 | F E pr Hu =F El: E E “ ae | 3 = xl wow | “> Ч яна | i als XQ 66,001 viu PET Dal ED mle Ab Erp FA LITE 5 и! + №! т = su oi i Ps cos RE Ter mI cl FA Ei ATC (A Ma Ea" Blu =a Cera E Te Td ges ¿ i e - page 23 Schematic SCHEMATIC - DMC-1152B / Page 3 of 6 THE DELTAMAX™ SYSTEM PCI SCID OLECMI Wi ==zzû nICE Oras "РЕ ** Eryn caw ec; Fa x J HOT $ EE % xl нс Aw wil Arad ~~ К "а + Tem 91 ee € ses Ar CE Leu xn CLA |} zea xa pan X = ez AT a xl я ae wa a OT Ley cima Et-énet pr ] IE unes a — = wow «+Н\ анна 00 Ni MÉTÉ na Ema e ENEE EEN xi MEL ната Ен remo page 24 Schematic SCHEMATIC - DMC-1152B / Page 4 of 6 THE DELTAMAX™ SYSTEM HE xa m ST E LEED BRED El Wie El MOE cio yell æl wey a FE РРыЙ pies | ere > TeCa ah te ED cecs en boit ETE El METE y т в En EE " rt на Ш L¥EW “tae Lym KE y E 555 EL wo mio > DSC il Tf Il os EE LIE all + Nes mot #1 HERE EFEC C+Ch mado Eme | ЭТОМ wi page 25 EE THE DELTAMAX™ SYSTEM Schematic SCHEMATIC - DMC-1152B / Page 5 of 6 Ao 1 AD IM У НН je Ap E: ¡A L ¡A carers a“. e a. r= Ex: a 0d “ER ` + -20d8 Suda = ——— ил + Le ‚7 obed S30vd (8) sano 43MIOS pi +11 CHO < | | : ELE T LI zn 05/0001 £2 05/0001 | 7 +9 7 sia] hes En #OOtNIL , ZHD 140 JW 9 Jo 9 ab2d / 8ZSL1-ONG - OILYN3HIS W3LSAS uXVINYLT30 3HL эцешецэс 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 1/10 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 Ye-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 woofer cutouts in the baffle board and may be removed from the horn (using a %/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: DN = EV Part Numbers tem DML-1152AP/1152APF DML-1152MC Complete woofer 815-1317 815-1317 HP driver diaphragm kit 81147XX 81147XX Logo nameplate assy. 81680 81680 Foam grille 72713 72690 Steel grille assy. 81923 81872 Input panel sub-assy. 81866 82034 Connector (NLAMPR) 17305 17305 Cable Connector 17306 17306 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 ig 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 Si at 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; (¢) malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner's manual; (a) 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- ether 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 of 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 pp 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 accessories) is guaranteed against malfunction due to defects in materials or workmanship for a period of one (1) Your from the date of original purchase.Additional details are included in the Uni- form Limited Warranty statement. Service and repair address for this product: Electro- Voice, Inc., 600 Cecil Street, Buchanan, Michigan 49107 (616/695-6831 or 800/234-6831). Specifications subject to change without notice. page 26 [O rai nao a dio — THE DELTAMAX™ SYSTEM DMC-1152B REPAIR PARTS LIST Power Supply Board Assembly (27-01-038256) Repair Parts List C1,05,06 15-01-124502 — Capacitor, 10uf, 50 volt, aluminum electroylitic, Radial Lead C3,C4 15-01-124505 Capacitor, 1000uf, 50 volt, aluminum electroylitic, Radial Lead C2 15-02-026884 Capacitor, 0.01uf, 250 volt, ceramic, UL approved U1 17-01-121660 |.C., voltage regulator, +15V, LM7815 U2 17-01-121659 |.C., voltage regulator, ~15V, LM7915 из 17-01-119087 |.C., voltage regulator, +5V, LM7805 CR1 48-02-037580 Bridge Rectifier, 1.5 amp, pc mount CR2, CR3, CR5 48-02-042787 Diode, 1N4004, 400V, 1A CR4 39-01-124973 LED, green Fi 51-04-124634 Fuse, 175mA, 250V, siow blow Ti 56-08-025906 — Transformer, power, pc mount DMC-1152B Main Board Assembly (27-01-038255) C53,C70 15-01-027316 Capacitor, 100uf, 35V, aluminum electrolytic C222,G322 15-01-027317 Capacitor, 1000uf, 35V, aluminum electrolytic C206,C306,C54, C71 15-01-027327 Capacitor, 47uf, 25V, aluminum electrolytic C12 15-01-028703 Capacitor, 4.7uf, 63V, aluminum electolytic C6,G11,C321 15-01-028850 Capacitor, 1uf, 35V, aluminum electrolytic C221 15-01-028851 Capacitor, 2.2uf, 35V, aluminum electrolytic C201,0203,0212, C224,C301,C303, C324 15-01-122935 Capacitor, 10uf, 35V, aluminum electrolytic Ci4 15-01-026831 Capacitor, 220pf, 50V, ceramic C41,C50,C51,C58 C67,C68 15-02-027325 Capacitor, 150pf, 100V, ceramic С1,С3,С4,С5 15-02-027320 Capacitor, 0.0015uf, 50V, 5%, mylar C9,C202,C203 15-02-027455 Capacitor, 100pf, 50V, ceramic cio 15-06-037470 Capacitor, 330pf C2,C15,C20,C21, 022,023,055,056, C57,C72,C73,C74 15-06-028065 Capacitor, 0.01uf, 50V, 2%, mylar C7,C8,C701,C702, C703,C704,C705, C706,C707,C708, C709,C710,C711, C712,C715,C716, C717,C718 15-02-100307 Capacitor, 0.01uf, 100V, Z5U ceramic C52,C59 C60,C69, C208,C211.C216, C217,C220 15-06-037653 = Capacitor, 0.1ut, 50V, 2%, mylar C13,042,C43.C44 15-06-037649 Capacitor, 0.001uf, 50V, 2%, mylar C307 15-06-038210 Capacitor, 0.0012uf, 100V, 2%, mylar C45 15-06-037650 Capacitor, 0.0047uf, 100V, 2%, mylar C213,C308 15-06-038214 Capacitor, 0.012uf, 100V, 2%, mylar C223 15-06-037652 Capacitor, 0.0015uf, 100V, 2%, mylar C63,C64 15-06-037655 Capacitor, 0.0082uf, 100V, 2%, mylar C323 15-06-026823 Capacitor, 0.01uf, 50V, 5%, mylar C501 15-06-027367 Capacitor, 0.047uf, 50V, 5%, mylar C207,C209,C210, C214,C215,C218, C219,C75 15-06-037651 = Capacitor, 0.047uf, 100V, 2%, mylar C505,0509,0510 15-06-028020 Capacitor, 0.0220, 50V, — 10%, mylar C312 15-06-038211 Capacitor, 0.33uf, 100V, 2%, mylar C314,C315 15-06-038212 Capacitor, 0.0018uf, 100V, 2%, mylar C313 15-06-028853 Capacitor, 0.0068uf, 100V, 2%, mylar A201,A202,A203, A204,A301,A302, A303,A305 17-01-027338 1.C., RC4136 A502,A505,A506 17-01-028867 — 1.C., LM339 A503,A504 17-01-028902 I.C., LM393P A2 17-01-028905 I.C., dbx2150A A7 17-01-028906 1.C., CA3046 AS 17-01-028907 I.C., NE5517N A1,A3,A10,A11, A12,A16 17-01-122832 |.C., NE5532A A4A13A18A21 17-01-124461 I.C., TLO74CN A20,A501 17-01-124688 — I.C., TLO72CP J2 21-01-028908 Connector, % inch phono jack, right angle Ji 21-01-124470 Connector, XLR, female, right angle 44,45 21-01-124642 Connector, XLR, male, right angle page 29 THE DELTAMAX™ SYSTEM Repair Parts List DMC-11528 Main Board Assembiy (continued) (27-01-038255) DMC-1152B Main Board Assembly (continued) (27-01-038255) R1,R8,R15,R118, R133,R136,R142, R226,R248,R327 47-03-109434 Resistor, 20.0K, 1%, WW R347,R148 47-03-124930 Resistor, 16.2K, 1%, '4W R93,R94,R122, R123 47-01-102111 Resistor, 24K, 5%, “WW R21 47-03-027330 Resistor, 26.7K, 1%, "АУУ R27,R28,R29, R223,R228,R323, R579,R580,R581 47-03-124615 Resistor, 30.1K, 1%, AW R229,R230 47-03-028260 Resistor, 47.5K, 1%, WW R31,R32,R217, D507 39-01-028846 LED, green D509 39-01-028893 LED, red 0508,0510,0511, D512,0513,0514, D516,0517,0519, D520 39-01-028894 LED, yellow R161,R271,R329 47-03-124678 Resistor, 3.01K, 1%, “UW R236 47-03-038233 Resistor, 4.32K, 1%, iW R13 47-01-028860 Resistor, 51, 5%, VW R244 47-03-038215 Resistor, 2.21M, 5%, iW R270 47-01-028864 Resistor, 3.3M, 5%, %W R510 47-03-038222 Resistor, 75.0, 1%, %W R2,R5,R117,R141 47-03-037770 Resistor, 100, 1%, ММ R10 47-03-038221 Resistor, 221, 1%, %W R509 47-03-038717 Resistor, 619, 1%, %W R17,R514,R523, R525,R526,R219 R527,R528,R536, R539,R546,R547, R549,R550,R552, R553,R221,R251, R319,R321 47-03-121532 Resistor, 1.00K, 1%, %W R101 47-03-124676 Resistor, 1.21K, 1%, %W R518,R519 47-03-119012 Resistor, 2.00K, 1%, %W R37 47-03-124957 Resistor, 2.21K, 1%, %W R210,R343 47-03-124677 Resistor, 2.43K, 1%, YW R39,R350 47-03-038219 Resistor, 2.67K, 1%, UW R146 47-03-037660 Resistor, 3.32K, 1%, UW R162, R314 R517 47-03-124838 Resistor, 3.92K, 1%, МММ R14,R214,R235, R310,R506 47-03-124672 Resistor, 4.75K, 1%, YAW R22,R30,R92, R119,R364 47-03-028695 Resistor, 5.11K, 5%, WW R143,R265 47-03-124673 Resistor, 6.19K, 1%, YW 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 47-03-109437 Resistor, 10.0K, 1%, 14W RO 47-03-124685 Resistor, 12.1K, 1%, UW ~ R20,R121 47-03-123010 Resistor, 13.0K, 1%, AW R18,R24,R25, R328,R507,R583, R585,R587 47-03-124484 Resistor, 15.0K, 1%, М R317 47-03-124659 Resistor, 51.1K, 1%, YW R247 47-03-038076 Resistor, 90.9K, 1%, %W R23 47-03-119034 Resistor, 61.9K, 1%, %W R19 47-03-028245 Resistor, 68.1K, 1%, UW R365 47-01-109298 Resistor, 180K, 5%, VAW R36,R40,R156, R218,R220,R269, R315,R318,R320, R360,R504,R505 47-03-119305 Resistor, 100K, 1%, %W R245 R246 47-03-038216 Resistor, 182K, 1%, AW "R344 47-03-026892 Resistor, 150K, 1%, %W R33,R34,R35, R38,R215,R241, R330,R341 47-03-038217 Resistor, 475K, 1%, Y4W R260 47-03-037771 Resistor, 4.75M, 1%, AW R515,R537,R540 47-03-026839 Resistor, 243K, 1%, VW R231 47-03-037661 Resistor, 825K, 1%, WW R272 47-01-102132 Resistor, 160K, 5%, AW “ R503 47-03-123011 Resistor, 200K, 1%, AW R363 47-03-038224 Resistor, 5.62M, 1%, AW R54 47-03-027328 Resistor, 806, 1%, %W R58,R96 47-03-124724 Resistor, 17.8K, 1%, KW R157 47-03-028251 Resistor, 6.04K, 1%, YAW R57,R59,R60 47-03-121651 Resistor, 14.7K, 1%, %W R151 47-03-028857 Resistor, 8.06K, 1%, %W R240,R340 47-03-038218 Resistor, 536K, 1%, AW R155 47-03-028240 Resistor, 51.1K, 1%, %W R359 47-01-102054 Resistor, 100, 5%, AW R150 47-01-102106 Resistor, 19K, 5%, WW R267 47-01-102120 Resistor, 51K, 5%, AW R12,R544 47-01-102127 Resistor, 100K, 5%, YaW R263 47-03-029035 Resistor, 18.2K, 1%, iW R508 47-03-037662 Resistor, 3.65K, 1%, %W R232,R233 47-03-037665 Resistor, 75.0K, 1%, AW R362 47-03-038077 Resistor, 3.57M, 1%, %W R524 47-03-038220 Resistor, 750, 1%, %W R100 47-03-121451 Resistor, 16.5K, 1%, VW R591 47-03-122858 Resistor, 27.4K, 1%, AW R234 R261,R262 47-03-122861 Resistor, 35.7K, 1%, AW R124 47-03-124632 Resistor, 162K, 1%, W R264 47-03-124646 Resistor, 1.82K, 1%, “UW R239,R339 47-03-124655 Resistor, 11.3K, 1%, VW R516 47-03-124657 Resistor, 22.6K, 1%, AW R99,R590 47-03-124669 Resistor, 1.50K, 1%, УМ page 30 A. sar THE DELTAMAX™ SYSTEM DMC-1152B Main Board Assembly (continued) (27-01-038255) R56,R322 47-03-124696 Resistor, 4.99K, 1%, AW R51,R55,R144 47-03-124697 Resistor, 3.24K, 1%, WW R52,R53 47-03-124689 Resistor, 1.15K, 1%, VW RO0,R582,R584 47-03-124B05 Resistor, 7.50K, 1%, AW 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 01,02,03,04,05, D8,D9,D10,D11, D12,013,0100,0101, D102,0103,D114, D115,0116,D117, 0201,0202,0203, 0204,0207,0208, D209,0210,D211, D212,0213,0215, D216,0218,0219, 0220,0301,0302, D303,0304,0307, D308,D309,D310, D311,D312,D313, D315,0316,0318, D319,0320,D501, D502,0503,0504, D505 48-01-027340 Diode, Signal, 1N4447 D205,0206,0305, D306 48-01-028163 Diode, Zener, 6.2V, 1N5234 — D525,D526 48-01-028891 Diode, Zener, 15V, 1N4744 D222,0322 48-01-037486 Diode, Zener, 7.5V, 1N4737D D221,0321 48-01-028896 Diode, Zener, 3.9V, 1N4730A SWi1 51-02-028058 Switch, push ON/push OFF 12,13 56-07-026392 transformer, audio output Repair Parts List page 31
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