QSC Audio DCM-3, DCM-1 warranty qscaudio.com, Specifications

5.25" x 19" x 14"

85 VAC - 260 VAC, 50/60 Hz

(1) 6 ft. (2m) UL/CSA line cord

(1) User Manual

(1) Software Diskette, 3.5" HD

(1) Rocker Switch

(1) Momentary Push Button

(6 or 8) Momentary Push Button

(1) Rotary Potentiometer

(2) Test Point Jacks

(1) Slide Switch

(1) Momentary Push Button

(1) Green LED

(1) Green LED and (1) Yellow LED (6 or 8) Green LEDs

(13 or 20) Yellow LEDs

(1) Red LED

(1) Red LED

(2 or 3) Rotary Trimpots

(1) Slide Switch

(1) 25-pin female D-sub connector

(8, 11 or 15) 15-pin female high-densityD-sub connectors

(1) 9-pin female D-sub connector

(1) 6 terminal screw-terminal connector

(1) 9-pin male D-sub connector

(1) IEC style with fuse

Active Balanced 20k ohms

+14.2 dBu (4.0 Vrms)

+18.2 dBu (6.4 Vrms)

24 bit delta-sigma 128x oversampled Hardwire pass-through to DataPort outputs (via Surround-EX Insert)

0 dB to –18 dB in 0.1 dB steps

99 dB

0.02%

20 Hz – 20 kHz (no filtering)

24 bit delta-sigma 128x oversampled

24 bit digital IIR filters

DCM

Specifications

The QSC DCM acts as the interface between a cinema film audio processor and the power amplifiers in a bi-amp or tri-amp cinema sound system. The DCM performs two major functions: automatic and manual monitoring of processor and amplifier signals, and fully programmable crossover/EQ filtering.

Dimensions (HWD):

Line Voltage Requirements: Accessories Included:

Front Panel Controls

Power Switch:

Monitor Mode Select:

Monitor Channel Select:

Monitor Volume:

Test Lead Connections:

Bypass Mode Select Switch:

Diagnostics Button:

Indicators:

Power Indicator:

Monitor Mode Indicators:

Processor Channel Indicators:

Amplifier Channel Indicators:

Load Fault Indicator:

Clip Indicator:

Rear Panel Controls

Bypass Crossover Level:

Surround EX Mode Switch:

Rear Panel Control Connectors:

Input:

Amplifier DataPorts:

RS232 Serial Port:

Powered Sub/Hearing:

Impaired Output:

Surround EX Insert Point:

AC Power Inlet:

DCM Inputs

Screen Channels and Subwoofer: Input Stage Type:

Input Impedance:

Maximum Input Level (Screen channels):

Maximum Input Level (Subwoofer channels):

A/D Conversion (Screen channels only):

Surround Channels:

Dataport Outputs

Screen Channels:

Output Attenuation Steps:

Dynamic Range:

THD+N 20 Hz-20 kHz, +12 dBu

Input Level, All Filters Flat:

Frequency Response:

D/A Conversion:

Filter Topology:

Specifications subject to change without notice.

Crossover Filters:	Linkwitz-Riley 24 dB/octave digital filters
	programmable in approx. 1 Hz steps from
	150 Hz - 15 kHz
Parametric EQ:	Digital bandpass constant Q filter with ±10 dB
	of boost/cut programmable in approx. 1/10 octave
	steps from 80 Hz -15 kHz. Q is programmable
	in 1/10th octave steps from 1/10 to 2 octaves.
CD Horn EQ:	Available on high frequency outputs only
Screen EQ:	Available on high frequency outputs only
Delay:	Programmable in 21 µs steps from 0 to 21 ms
	per output
Polarity:	Normal, Inverted
Mute:	Individual mutes on each screen channel output
Subwoofer:
Output Stage Type:	Single ended (balanced impedance)
Output Attenuation Steps:	0 dB to –18 dB in 3 dB steps
Dynamic Range:	99 dB
THD+N 20 Hz-20 kHz, +12 dBu
Input Level, All Filters Flat:	0.02%
Filter Topology:	Digitally controlled analog on DCM-1,
	DSP on DCM-3
High Pass Filter:	Linkwitz-Riley 12 dB/octave filter. Q can be
	programmed as 0.707 or 2, flat or “step-down”
	operation
Mute:	One mute for all subwoofer outputs
Surround Channels:	Hardwire pass-through from processor input via
	Surround Insert
Output Channels (using the
Surround Insert connector):	2 or 3 selectable on rear panel
Amplifier A.C. Control
all amps power on with DCM activation
Emergency Bypass Crossover
Filter Type:	1st order Butterworth, 2 or 3 way
Attenuation Range (trimpot):	-6 dB to -24 dB
Powered Subwoofer Output
Output Stage Type:	Single ended (balanced impedance)
Output Impedance:	50Ω
Maximum Output Level:	+14.2 dBu (4.0 Vrms)
Loading Requirements (total of
remote & dataport connection):	RMIN = 2k ohms	CMAX = 4 nF
Hearing Impaired Output
Output Stage Type:	Single ended (balanced impedance)
Output Impedance:	50Ω
Nominal Output Level:	-11.8 dBu (200 mVrms)
Loading Requirements:	RMIN = 2k ohms	CMAX = 4 nF
Surround Insert I / O
Output Stage Type:	Hardwired connection to processor
	input connector
Input Stage Type:	Hardwired connection to DataPort
	output connector
Monitor Speaker
Dimensions:	4-inch full range driver
Amplifier Output Power:	10 watt class AB amplifier
Frequency Response:	100 Hz – 8 kHz (±2 dB)
Dynamic Processing:	1.5:1 compression

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174 qscaudio.com

DCM Spec Sheet - 02/23/06