Qsc CX404 Installation 4-Channel Power Amplifier

Model #CX404

QSC Warranty
Qsc cx404 1
Qsc cx404 1
Qsc cx404 2
Qsc cx404 3
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Packaging Info

Package Weight 27.3 lb
Box Dimensions (LxWxH) 24.0 x 18.0 x 6.0"

General Information

Input Sensitivity For Rated Power Into 8 Ohms: 1.22 (+3.9 dBu) For Rated Power Into 4 Ohms: EIA: 1.16 (+3.5 dBu)
Input Clipping Level 10 Vrms (+22 dBu)
Input Impedance 12 kOhms (Balanced)6 kOhms (Unbalanced)
Gain 31 dB at 8 Ohms
Frequency Response 20 Hz to 20 kHz, +/- 0.2 dB 8 Hz to 50 kHz, +0, -3 dB
Signal-to-Noise Ratio < -106 dB
Total Harmonic Distortion (THD) Distortion (SMPTE-IM): < 0.01% Distortion (Typical) 20 Hz to 20 kHz: < 0.01% THD (10 dB Below Rated Power) 1.0 kHz and Below: < 0.01% THD (Full Rated Power)
Cooling Variable-Speed Fan /Rear-to-Front Air Flow Through Tunnel Heat Sink
Input Connections Input: 4 x 3-Position Euro-Style Detachable Barrier Block, (Channels 1,2,3,4) DataPort: 2 x HD-15 Connector, Ch 1+2, Ch 3+4
Power Rating Stereo at 2 Ohms: Not Recommended Stereo at 4 Ohms: 400 W RMS per Channel Stereo at 8 Ohms: 250 W RMS per Channel Bridge-Mono at 4 Ohms: Not Recommended Bridge-Mono at 8 Ohms: 800 W RMS per Channel Bridge-Mono at 16 Ohms: 500 W RMS per Channel
Controls Front: AC Switch, Ch 1, 2, 3, and 4 Gain Knobs Rear: DIP Switches for Ch 1, 2, 3, 4 Clip Limiter On/Off LF Filter On/Off LF Filter Freq Select: 33 or 75 Hz Input Modes: Parallel, Stereo, or Bridge Mono
Indicators Parallel Inputs: Yellow LED Bridged: Yellow LED Power-On: Green LED Clip-Protection: Red LED Level -10 dB: Green LED Level -20 dB: Green LED Signal -35 dB: Green LED (1 per channel)
Amplifier Protection Full Short Circuit, Open Circuit, Thermal, Ultrasonic, and RF Protection Stable into Reactive or Mismatched Loads
Overload Protection On/Off Muting, DC-Fault Power Supply Shutdown
Power 120 V, 60 Hz
Power Consumption Idle: 0.7 A 1/8 Power Pink Noise (Typical of Program Material at Maximum Unclipped Power) 8 Ohms: 8.1 A 4 Ohms: 12.4 A 1/3 Power Pink Noise (Typical of Program Material with Severe Clipping) 8 Ohms: 12.2 A 4 Ohms: 19.3 A
Dimensions (H x W x D) 3.5 x 19.0 x 14.0" / 88.9 x 482.6 x 355.6 mm
Weight 21.0 lb / 9.5 kg
Output Connectors 2 x Six-Position Barrier Strips for Ch 1+2, Ch 3+4
Damping Factor > 500 (1 kHz and Below)
Product Highlights
  • 250W RMS Per Channel at 8 Ohms
  • 800W RMS Bridged at 8 Ohms
  • Euro-Style Barrier Block Inputs
  • Barrier Strip Outputs
  • Security Cover for Gain Controls
  • Stereo, Parallel, and Bridged Mono Mode
  • Comprehensive Protection Circuits
  • Class AB+B Topology
  • PowerLight Switch-Mode Power Supply
  • Low-Noise Variable-Speed Fans
In The Box
  • QSC CX404 Installation 4-Channel Power Amplifier
  • Power Cord
  • Security Panel
  • Limited 3-Year Warranty, Extended to 6 Years with Registration
Still Have Questions?
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