DCA 1644
4-Channel Power Amplifier
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" 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.
| SPECIFICATIONS |
DCA 1644 |
|
| 8Ω, 20 Hz–20 kHz, 0.05% THD |
Continuous Avg. output per channel
250 W |
|
| 4Ω, 20 Hz–20 kHz 0.1% THD |
400 W (1 kHz) |
|
EIA: 1 kHz, 1% THD @
4Ω
2Ω |
450 W
not rated |
|
| BRIDGED MONO MODE |
|
| 16Ω, 20 Hz–20 kHz, 0.1% THD |
500 W |
|
| 8Ω, 20 Hz–20 kHz, 0.1% THD |
800 W (0.1% THD, 1 kHz) |
|
| 4Ω, 1 kHz, 1% THD |
not rated |
|
Signal to Noise
20 Hz–20 kHz, unweighted |
- 105 dB |
|
Input Sensitivity
full rated power @ 8 ohms |
1.12 V rms |
|
Input Sensitivity
full rated power @ 4 ohms |
1.0 V rms |
|
| Output Circuitry Class Type |
AB+B |
|
| Distortion (SMPTE-IM) |
< 0.01% |
|
| |
BOTH MODELS |
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 |
Frequency Response
(LF filter switched off) |
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 kΩ unbalanced, 20 kΩ balanced |
| Input Clipping |
10 V rms (+22 dBu) |
| Cooling |
Variable-speed fan, rear-to-front air flow |
Connectors, each channel
|
Input: 3-pin detachable terminal blocks
Output: Safety-shrouded barrier strip, including monitor output
DataPort: One HD15 per pair of channels |
| Voltage Gain at 8 ohms |
40x (32 dB) |
| 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) |
| 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 |
| Amplifier Protection |
Full short circuit, open circuit, thermal, ultrasonic, and RF protection.
Stable into reactive or mismatched loads. |
| Load Protection |
On/off muting, DC-fault power supply shutdown |
| Dimensions (HWD) inches |
3.5 x 19 x 14 |
| Dimensions (HWD) mm |
89 x 483 x 356 |
| Weight |
21 lb (9.5 kg) net |
Optional Accessories
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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 WARNING: This product contains chemicals including Styrene which is known to the state of California to cause cancer, and Bisphenol A (BPA), which is known to the state of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
In certain instances promotional prices will be offered listed above as a “Price with Rebate”, and are typically dated. In these cases Instant Rebate (IR) pricing is good sometimes only for the day only or only for the week. In order to be eligible for IR pricing – the order must be paid for AND picked up/shipped out. If you are placing an online order outside of business hours within your respective time zone, please add a note to your order for the team to confirm the pricing, or contact the branch the following business day to ensure that the item pricing carries over into the subsequent period. If an alternate branch location is still open in another time zone, please reach out to that group.
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