Power Amplifier QSC Cinema DCA-1644

QSC Cinema DCA-1644

Amplifiers series DCA have a number of proprietary developments under the general name "A QSC cinema exclusive". Among them: active limitation of the starting current. The highlight of QSC Cinema DCA-1644 is PowerLight technology providing dynamic saturation of low frequencies. The rear panel houses the DataPort interface for integration with QSC digital video processors. The DCA-1644 has LED indicators for monitoring the status and operating mode of the amplifier.

Specs

• Number of channels: 4
• Power at 8 Ohm, 20 Hz – 20 kHz, 0,05% THD: 250 W
• Power at 4 Ohm, 20 Hz – 20 kHz, 0,1% THD: 400 W
• Power at 4 Ohm, EIA: 1 kHz, 1% THD @: 450 W
• Bridged Mono Mode
• • 16 Ohm, 20 Hz - 20 kHz, 0,1% of the SOI: 500 W
  • 8 Ohm, 20 Hz - 20 kHz, 0,1% of the SOI: 800 W
• 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 (Typical)
  • 20 Hz – 20 kHz: 10 dB below rated power: Less than 0,02% THD @ 8 and 4 ohms
  • 1 кHz and below: full rated power: Less than 0,02% THD @ 8 and 4 ohms
• Frequency Response
  • LF filter switched on: 20 Hz – 20 кHz, ± 0,2 dB
  • LF filter switched off: 8 Hz – 50 кHz, +0/-3 dB
• Damping Factor 1 kHz and below: Greater than 500
• Input Impedance: 10 kOhm unbalanced and 20 kOhm 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: 40х (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
  • 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: 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: 483х89х356 mm
• Weight: 9,5 kg

User Manual