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Q-SYS DCA1644 4-Channel Cinema Power Amplifier for Theatres

Q-SYS DCA1644 4-Channel Cinema Power Amplifier for Theatres

SoundPro Item: 119384 | Part Number: DCA1644

$1,675.00
$1,675.00 $1,675.00
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MSRP: $1,675.00 | MAP: $1,675.00

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  • DataPort HD15 Connectivity Links Directly to DCM and DCP Cinema Processors
  • Active Inrush Limiting Protects Facility Circuit Breakers at Power-On
  • Gain Control Security Cover Prevents Accidental Misadjustment in Unattended Booths
  • AB+B Output Circuitry With Damping Factor Exceeding 500 for Tight Low-Frequency Control
  • Per-Channel DIP Switches Control Clip Limiter, LF Filter, Frequency, and Bridge Mode
  • Full Short Circuit, Open Circuit, Thermal, Ultrasonic, and RF Amplifier Protection
  • Variable-Speed Fan With Rear-to-Front Airflow Maintains Thermal Stability in Rack Enclosures
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The Q-SYS DCA1644 is a four-channel power amplifier engineered specifically for cinema sound system installations. It targets integrators and system designers deploying audio in small to medium theaters, where consistent output, compact rack footprint, and compatibility with cinema signal processing infrastructure are non-negotiable. Its 2RU, 14-inch-deep chassis fits console-mounted rack systems without consuming excessive depth, and the 21-pound chassis keeps labor burden manageable during installation and service calls.

Each unit ships with a DataPort — an HD15 connector per pair of channels — designed for direct interfacing with DCM and DCP Digital Cinema Monitor and Processor systems. This integration point is the key differentiator against general-purpose commercial amplifiers in the same power class: the DCA1644 participates in a complete cinema signal chain rather than functioning as a standalone device, reducing field wiring complexity and system integration labor. Gain control security covers prevent accidental misadjustment in unsupervised booth environments, and active inrush limiting protects facility circuit breakers during power-on sequences.

For system designers working with tri-amp configurations in larger venues, the DCA1644 handles mid and high-frequency duties with AB+B output circuitry, a damping factor exceeding 500, and full protection against short circuit, open circuit, thermal, ultrasonic, and RF faults. Bridged mono mode extends output capacity for demanding applications, and per-channel DIP switch control over clip limiting, LF filtering, and input mode gives engineers the flexibility to tune behavior at the rack without additional outboard gear.

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Specifications

Audio
Output Per Channel (8Ω, 20 Hz–20 kHz, 0.05% THD)
250 W continuous avg.
Output Per Channel (4Ω, 20 Hz–20 kHz, 0.1% THD)
400 W (1 kHz)
Output Per Channel EIA (4Ω, 1 kHz, 1% THD)
450 W
Bridged Mono Output (16Ω, 20 Hz–20 kHz, 0.1% THD)
500 W
Bridged Mono Output (8Ω, 20 Hz–20 kHz, 0.1% THD)
800 W (0.1% THD, 1 kHz)
Signal to Noise Ratio (20 Hz–20 kHz, unweighted)
−105 dB
Input Sensitivity (full rated power @ 8Ω)
1.12 V rms
Input Sensitivity (full rated power @ 4Ω)
1.0 V rms
Output Circuitry Class
AB+B
Distortion SMPTE-IM
< 0.01%
Distortion THD (20 Hz–20 kHz, 10 dB below rated power)
< 0.02% @ 8Ω and 4Ω
Distortion THD (1.0 kHz and below, full rated power)
< 0.02% @ 8Ω and 4Ω
Frequency Response (LF filter 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)
Voltage Gain at 8Ω
40x (32 dB)
Channel Count
4
Connectivity
Input Connectors
3-pin detachable terminal blocks per channel
Output Connectors
Safety-shrouded barrier strip including monitor output
DataPort
One HD15 per pair of channels
Controls
Front Panel
AC switch; Ch. 1–4 recessed gain knobs
Rear Panel DIP Switches
Clip Limiter on/off per channel; LF Filter on/off per channel; LF Filter Freq 30 or 50 Hz per channel; Inputs Parallel or Stereo; Bridge Mode
Indicators
Per-Channel LEDs
CLIP/PROT (Red); LEVEL −10 dB (Green); LEVEL −20 dB (Green); SIGNAL −35 dB (Green); BRIDGED (Yellow); PARALLEL INPUTS (Yellow); POWER ON (Green)
Construction
Cooling
Variable-speed fan, rear-to-front airflow
Rack Space
2U
Dimensions
Dimensions HWD (in)
3.5" x 19" x 14"
Dimensions HWD (mm)
89 x 483 x 356
Weight
Net Weight
21 lbs (9.5 kg)

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