FEATURES
- 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/DCP - Digital Cinema Monitor; Digital Cinema Processor, a total system solution that greatly reduces labor & wiring costs.
- Compact size (2-RU, 14-inch deep) ideal for use in console-mounted sound systems
- All models weigh only 21 pounds, 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!
| SPECIFICATIONS | DCA 1644 | DCA 1824 |
| 8Ω, 20 Hz–20 kHz, 0.05% THD |
Continuous Avg. output per channel 250 W |
Continuous Avg. output per channel 170 W |
| 4Ω, 20 Hz–20 kHz 0.1% THD | 400 W (1 kHz) | 250 W |
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EIA: 1 kHz, 1% THD @ 4Ω 2Ω |
450 W not rated |
- 450 W |
| BRIDGED MONO MODE | ||
| 16Ω, 20 Hz–20 kHz, 0.1% THD | 500 W | 340 W |
| 8Ω, 20 Hz–20 kHz, 0.1% THD | 800 W (0.1% THD, 1 kHz) | 500 W |
| 4Ω, 1 kHz, 1% THD | not rated | 900 W |
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Signal to Noise 20 Hz–20 kHz, unweighted |
- 105 dB | - 105 dB |
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Input Sensitivity full rated power @ 8 ohms |
1.12 V rms | 0.93 V rms |
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Input Sensitivity full rated power @ 4 ohms |
1.0 V rms | 0.8 V rms |
| Output Circuitry Class Type | AB+B | AB+B |
| Distortion (SMPTE-IM) | < 0.01% | < 0.01% |
| BOTH MODELS | ||
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Distortion (Typical) 20 Hz–20 kHz: 10 dB below rated power 1.0 kHz and below: full rated power |
Less than 0.02% THD @ 8 and 4 ohms Less than 0.02% THD @ 8 and 4 ohms |
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Frequency Response (LF filter switched off) |
20 Hz–20 kHz, ± 0.2 dB 8 Hz–50 kHz, + 0, -3 dB |
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| Damping Factor 1 kHz and below |
Greater than 500
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| Input Impedance |
10 kΩ unbalanced, 20 kΩ balanced
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| Input Clipping |
10 V rms (+22 dBu)
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| Cooling |
Variable-speed fan, rear-to-front air flow
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Connectors, each channel |
Input: 3-pin detachable terminal blocks
Output: Safety-shrouded barrier strip, including monitor output
DataPort: One HD15 per pair of channels
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| Voltage Gain at 8 ohms |
40x (32 dB)
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| Controls |
Front: AC switch, Ch. 1,2,3 and 4 recessed gain knobs
Rear: DIP switch (Clip Limiter on/off, each channel; LF Filter on/off, each channel; LF Filter Freq select 30 or 50 Hz, each channel; Inputs Parallel or Stereo; Bridge Mode) |
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| Indicators |
1 each per channel:
CLIP/PROT: Red LED LEVEL -10 dB: Green LED LEVEL -20 dB: Green LED SIGNAL -35 dB: Green LED BRIDGED: Yellow LED PARALLEL INPUTS: Yellow LED POWER ON: Green LED |
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| Amplifier Protection |
Full short circuit, open circuit, thermal, ultrasonic, and RF protection.
Stable into reactive or mismatched loads. |
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| Load Protection |
On/off muting, DC-fault power supply shutdown
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| Dimensions (HWD) inches | 3.5 x 19 x 14 | |
| Dimensions (HWD) mm |
89 x 483 x 356
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| Weight |
21 lb (9.5 kg) net
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Optional Accessories Download the Cinema Accessories for DCA Amps User Manual (PDF 410k) |
XC-3 Cinema Crossover, for bi-amp applications with all commonly used cinema speakers
SF-3 Subwoofer Filter, an adjustable highpass filter for subwoofers LF-3 Low Frequency Filter, used with the XC-3 for tri-amp applications |
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