BACP Printer Friendly Version - QSC DCA 4 Channel Features and Specifications

QSC Digital Cinema Amplifier - 4 Channel

DCA (4 Channel) Features

The DCA 1824 is ideal for surround channels-each channel can power up to four 8 ohms speakers in parallel for a total of up to 16 speakers.

The DCA 1644 is perfect for powering screen channels in small to medium theatres, or for powering mids and highs in tri-amp systems for larger theatres.

DCAs are equipped with a DataPort for use with QSC DCM-Digital Cinema Monitors, a total system solution that greatly reduces labor & wiring costs.

Compact size (2-RU, 14" deep) ideal for use in console-mounted sound systems

All models only 21 lbs. for easier racking and shipping.

Active Inrush Limiting won't blow circuit breakers at turn-on.

Gain control security cover protects amp from misadjustment.

3 year warranty plus optional 3 year extended service contract!

DCA 4-CHANNEL SPECIFICATIONS	DCA 1644	DCA 1824
Stereo Mode (both channels driven)
8 ohms FTC 20 Hz-20 kHz 0.05% THD	250W	170W
8 ohms EIA 1 kHz 1% THD	-	-
4 ohms EIA 20 Hz-20 kHz 0.1% THD	400W*	250W
4 ohms EIA 1 kHz 1% THD	450	-
2 ohms EIA 1 kHz 1% THD	not rated	450W
Bridge Mono Mode
16 ohms FTC 20 Hz-20 kHz 0.1% THD	500W	340W
8 ohms EIA 20 Hz-20 kHz 0.1% THD	900W*	500W
4 ohms EIA 1 kHz 1% THD	not rated	900W
Signal-to-noise (20 Hz-20 kHz)	<-105 dB	<-105 dB
Input Sensitivity @ 8 ohms	1.12 Vrms	0.93 Vrms
Input Sensitivity @ 4 ohms	1.00 Vrms	0.80 Vrms
Output Circuitry	AB+B	AB+B
Power Requirements (1/8 pink noise)	10A @ 4 ohms	9A @ 8 ohms
Distortion (SMPTE-IM)	Less than 0.01%	Less than 0.01%

All Models
Distortion (typical) 20 Hz-20 kHz: 10 dB below rated power 1.0 kHz and below: full rated power	Less than 0.01% THD
Frequency Response	20 Hz-20 kHz, ± 0.2 dB 8 Hz-50 kHz, +0/-3 dB
Damping Factor (1 kHz and below)	greater than 500
Input Impedance	10 K ohms unbalanced, 20 K ohms balanced
Input Clipping	10 Vrms (+22 dBu)
Cooling	Variable speed fan (off at idle), rear to front airflow
Connectors (each channel)	Input: 3 pin detachable terminal blocks (1 each per channel) Output: Safety-shrouded barrier strip, including monitor output Dataport: One HD-15 per pair of channels
Controls	Front: AC switch, Ch.1, Ch.2, Ch.3 and Ch. 4 gain knobs Rear: DIP switch for Ch.1, Ch.2, Ch.3 and Ch.4: clip limiter on/off, LF filter on/off, LF filter freq select-30 or 50 Hz; inputs parallel or stereo; bridge mode
Indicators	PARALLEL INPUTS: Yellow LED (1 per pair of channels) BRIDGED: Yellow LED (1 per pair of channels) PWR-ON: Green LED CLIP/PROT: Red LED (1 per channel) LEVEL-10 dB: Green LED (1 per channel) LEVEL-20: Green LED (1 per channel) SIGNAL-35 dB: Green LED (1 per channel)
Amplifier Protection	Full short circuit, open circuit, thermal, ultrasonic, & protection. Stable into reactive or mismatched loads.
Load Protection	On/off muting, DC-fault power supply shutdown
Dimensions	19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 rack spaces), 14" (35.6 cm) deep (from front mounting rails)
Weight	21 lb (9.5 kg) net, 27 lbs (12.3 kg) shipping
Voltage Gain	40x (32 dB)