QSC DCM-1 Specification Sheet
Also see for DCM-1: User manual
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DCM Specificationsqscaudio.comSpecifications subject to change without notice.1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174DCM Spec Sheet - 02/23/06The QSC DCM acts as the interface between a cinema film audio processor and the poweramplifiers in a bi-amp or tri-amp cinema sound system. The DCM performs two majorfunctions: automatic and manual monitoring of processor and amplifier signals, and fullyprogrammable crossover/EQ filtering.Dimensions (HWD): 5.25" x 19" x 14"Line Voltage Requirements: 85 VAC - 260 VAC, 50/60 HzAccessories Included: (1) 6 ft. (2m) UL/CSA line cord(1) User Manual(1) Software Diskette, 3.5" HDFront Panel ControlsPower Switch: (1) Rocker SwitchMonitor Mode Select: (1) Momentary Push ButtonMonitor Channel Select: (6 or 8) Momentary Push ButtonMonitor Volume: (1) Rotary PotentiometerTest Lead Connections: (2) Test Point JacksBypass Mode Select Switch: (1) Slide SwitchDiagnostics Button: (1) Momentary Push ButtonIndicators:Power Indicator: (1) Green LEDMonitor Mode Indicators: (1) Green LED and (1) Yellow LEDProcessor Channel Indicators: (6 or 8) Green LEDsAmplifier Channel Indicators: (13 or 20) Yellow LEDsLoad Fault Indicator: (1) Red LEDClip Indicator: (1) Red LEDRear Panel ControlsBypass Crossover Level: (2 or 3) Rotary TrimpotsSurround EX Mode Switch: (1) Slide SwitchRear Panel Control Connectors:Input: (1) 25-pin female D-sub connectorAmplifier DataPorts: (8, 11 or 15) 15-pin female high-densityD-sub connectorsRS232 Serial Port: (1) 9-pin female D-sub connectorPowered Sub/Hearing:Impaired Output: (1) 6 terminal screw-terminal connectorSurround EX Insert Point: (1) 9-pin male D-sub connectorAC Power Inlet: (1) IEC style with fuseDCM InputsScreen Channels and Subwoofer:Input Stage Type: Active BalancedInput Impedance: 20k ohmsMaximum Input Level(Screen channels): +14.2 dBu (4.0 Vrms)Maximum Input Level(Subwoofer channels): +18.2 dBu (6.4 Vrms)A/D Conversion(Screen channels only): 24 bit delta-sigma 128x oversampledSurround Channels: Hardwire pass-through to DataPort outputs(via Surround-EX Insert)Dataport OutputsScreen Channels:Output Attenuation Steps: 0 dB to –18 dB in 0.1 dB stepsDynamic Range: 99 dBTHD+N 20 Hz-20 kHz, +12 dBuInput Level, All Filters Flat: 0.02%Frequency Response: 20 Hz – 20 kHz (no filtering)D/A Conversion: 24 bit delta-sigma 128x oversampledFilter Topology: 24 bit digital IIR filtersCrossover Filters: Linkwitz-Riley 24 dB/octave digital filtersprogrammable in approx. 1 Hz steps from150 Hz - 15 kHzParametric EQ: Digital bandpass constant Q filter with ±10 dBof boost/cut programmable in approx. 1/10 octavesteps from 80 Hz -15 kHz. Q is programmablein 1/10th octave steps from 1/10 to 2 octaves.CD Horn EQ: Available on high frequency outputs onlyScreen EQ: Available on high frequency outputs onlyDelay: Programmable in 21 μs steps from 0 to 21 msper outputPolarity: Normal, InvertedMute: Individual mutes on each screen channel outputSubwoofer:Output Stage Type: Single ended (balanced impedance)Output Attenuation Steps: 0 dB to –18 dB in 3 dB stepsDynamic Range: 99 dBTHD+N 20 Hz-20 kHz, +12 dBuInput Level, All Filters Flat: 0.02%Filter Topology: Digitally controlled analog on DCM-1,DSP on DCM-3High Pass Filter: Linkwitz-Riley 12 dB/octave filter. Q can beprogrammed as 0.707 or 2, flat or “step-down”operationMute: One mute for all subwoofer outputsSurround Channels: Hardwire pass-through from processor input viaSurround InsertOutput Channels (using theSurround Insert connector): 2 or 3 selectable on rear panelAmplifier A.C. Controlall amps power on with DCM activationEmergency Bypass CrossoverFilter Type: 1st order Butterworth, 2 or 3 wayAttenuation Range (trimpot): -6 dB to -24 dBPowered Subwoofer OutputOutput Stage Type: Single ended (balanced impedance)Output Impedance: 50ΩMaximum Output Level: +14.2 dBu (4.0 Vrms)Loading Requirements (total ofremote & dataport connection): RMIN = 2k ohms CMAX = 4 nFHearing Impaired OutputOutput Stage Type: Single ended (balanced impedance)Output Impedance: 50ΩNominal Output Level: -11.8 dBu (200 mVrms)Loading Requirements: RMIN = 2k ohms CMAX = 4 nFSurround Insert I / OOutput Stage Type: Hardwired connection to processorinput connectorInput Stage Type: Hardwired connection to DataPortoutput connectorMonitor SpeakerDimensions: 4-inch full range driverAmplifier Output Power: 10 watt class AB amplifierFrequency Response: 100 Hz – 8 kHz (±2 dB)Dynamic Processing: 1.5:1 compression |
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