The DCA 1644 is a DCA series digital cinema amplifier provides latest advances in sound system technology such as Dolby Digital Surround-EX and tri-amplification require more amplifier channels than ever before. This newest DCA amplifier gives four channel
The DCA 1644 is a DCA series digital cinema amplifier provides latest advances in sound system technology such as Dolby Digital Surround-EX and tri-amplification require more amplifier channels than ever before. This newest DCA amplifier gives four channels of power in a compact package that doesn’t eat up precious rack space. In addition to their superior performance we’ve packed these amps with useful features designed specifically for the cinema market. With PowerLight technology, DCA amplifiers take your soundtracks to a whole new level. Not only does it give your music bigger bass and cleaner highs, PowerLight also cuts wasted heat and boosts reliability. PowerLight is a switching power supply that provides ample current to the audio power circuitry by charging the supply rails 230,000 times a second through an ultra-low impedance circuit, so unlike high-powered amps with conventional supplies, the audio signal is never starved prematurely, but remains crisp and clean. It virtually eliminates hum and greatly reduces noise, providing a vast dynamic range that can handle the most demanding digital soundtracks without running out of headroom. DCA series amps also boast a set of useful features such as individually selectable clip limiters and subsonic filters and stereo, parallel, and bridged mono operation.
Features
Specifications
SPECIFICATIONS | DCA 1644 |
8, 20 Hz20 kHz, 0.05% THD |
Continuous Avg. output per channel 250 W |
4, 20 Hz20 kHz 0.1% THD | 400 W (1 kHz) |
EIA: 1 kHz, 1% THD @ 4 2 |
450 W not rated |
BRIDGED MONO MODE | |
16, 20 Hz20 kHz, 0.1% THD | 500 W |
8, 20 Hz20 kHz, 0.1% THD | 800 W (0.1% THD, 1 kHz) |
4, 1 kHz, 1% THD | not rated |
Signal to Noise 20 Hz20 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 Hz20 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 Hz20 kHz, 0.2 dB 8 Hz50 kHz, + 0, -3 dB |
Damping Factor 1 kHz and below | Greater than 500 |
Input Impedance | 10 k unbalanced, 20 k 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 outputDataPort: 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 |
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