QSC CX404 4-Channel Power Amplifier

QSC CX404 4-Channel Power Amplifier

QSC CX404 4-Channel Power Amplifier

B&H # QSCX404 MFR # CX404

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Product Highlights

  • 250W @ 8 Ohms Stereo
  • 800W @ 8 Ohms Bridged Mono
  • 4-Channels
  • Active Inrush Limiting
  • Euro Style Input Connectors
  • HD15 DataPort Connector
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QSC CX404 overview

  • 1Description

The QSC CX404 is a 4-channel power amplifier, designed primarily in support of fixed installation sound systems. The 2RU rackmountable unit is surprisingly lightweight, and provides a customized integrated security cover.

Designed for a space and energy efficient working life in a facility rack, QSC has equipped the CX404 with a varispeed fan cooling system, featuring rear to front airflow exiting through the front panel grill, and the uniquely efficient Powerwave technology for the switching power supply. The Powerwave design sends current to the amp's power circuitry by charging the supply rails a staggering 230,000 times a second via a very low impedance circuit. The result is a consistently clean signal, and efficient, predictable power distribution that contributes to lowered heat buildup and improved signal reproduction.

The CX404 is loaded with rear panel controls and front panel indicators, including dedicated, detented rotary gain control knobs, LF filter switches, and clip protection activation. An HD15 Dataport is located on the rear panel for computer-integrated remote control and system updating, using QSCcontrol software.

The CX404 incorporates the design, cost-effective operation, and performance features that QSC is able to implement after three decades of experience building amplifiers serving all professional sound markets.

Three models that range in power from 170 watts to 450 watts per channel
Compact size-all models only 2 RU and 14" deep for reduced rack cost and floor space
Channels 1&2 and 3&4 bridgeable for maximum flexibility
Active Inrush Limiting eliminates AC inrush current, removing the need for expensive power sequencers
HD15 DataPort connector for Q-Sys and QSControl computer control and monitoring
Custom integrated security cover for tamper-proof installations
Variable speed fan for low noise
1dB detented gain controls for fast and accurate gain settings
Detachable Euro style input connectors
DIP switch control for clip limiters, high pass filters, bridge mono and parallel operation
Exclusive PowerLight switch-mode power supply technology for high performance and compact size
Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (33Hz or 75Hz on non-V models, 50Hz or 75Hz on V models)
Comprehensive front panel indicators including signal, clip, protect and QSC's exclusive bridge mono and parallel input LEDs
Barrier strip output connector
Comprehensive protection circuitry including DC, infrasonic, thermal overload and short circuit protection
High-performance Class AB+B complementary bipolar output circuitry
Light weight-all models only 21 pounds (9.5 kg) for easier racking and shipping
3-year warranty plus optional 3-year extended service contract
All CX Series amplifiers meet the European Union's, 2006 RoHS directive to restrict the use of hazardous materials used in electronic devices.
UPC: 684284001498
In the Box
QSC CX404 4-Channel Power Amplifier
  • Power Cable
  • Owner's Manual
  • 3 Year Warranty
  • Table of Contents
    • 1Description

    QSC CX404 specs

    Power Rating Stereo @ 2 Ohms: Not Recommended
    Stereo @ 4 Ohms: 400W per Channel
    Stereo @ 8 Ohms: 250W per Channel
    Bridge-Mono @ 4 Ohms: 900W per Channel
    Bridge-Mono @ 8 Ohms: 800W per Channel
    Bridge-Mono @ 16 Ohms: 500 Watts per Channel
    Damping Factor >500(1kHz and below)
    Input Sensitivity 1.22 Vrms
    Input Impedance 12k ohms(Balanced)
    6k ohms(Unbalanced)
    Gain 31dB @ 8 ohms
    Frequency Response 20Hz - 20kHz, +/- 0.2 dB
    8Hz - 50kHz, +0, -3 dB
    Signal-to-Noise Ratio < - 106dB
    Total Harmonic Distortion (THD) < 0.01%, 10db
    Input Connections Input: 3 position Euro-style detachable barrier block, Ch 1,2,3 & 4
    DataPort: HD-15 Connector, Ch 1+2, Ch 3+4
    Output Connectors Output: Six-position barrier strip with monitor connections, Ch 1+2, Ch 3+4
    Controls Front Panel Controls Front: AC switch, Ch.1 and Ch.2 gain knobs
    Controls (Rear) Rear: DIP switch for Ch.1 and Ch.2: clip limiter on/off, LF filter on/off, LF filter freq select 33 Hz or 75 Hz for non-V models; 50 Hz or 75 Hz for V models; inputs parallel or stereo; bridge mode
    Indicators PARALLEL INPUTS: Red LED
    BRIDGED: Yellow LED
    PWR-ON: Green LED
    CLIP/PROT: Red LED (1 per channel)
    LEVEL-10 dB: Yellow LED (1 per channel)
    LEVEL-20 dB: Yellow LED (1 per channel)
    SIGNAL -35 dB: Green LED (1 per channel)
    Cooling Variable Speed Fan, Rear to Front Airflow through Tunnel Heat Sink
    Power Consumption 100, 120, 230 VAC, 50-60 Hz
    Dimensions (WxHxD) 19 x 3.5 x 14" (483 x 89 x 356mm)
    Weight 21 lbs (9.5kg)
    Specialties Powerwave Power Supply
    Varispeed Fan Cooling
    Custom Integrated Security Cover
    Packaging Infouuyezzyvtwubauubbraaasyssr
    Package Weight 27.3 lb
    Box Dimensions (LxWxH) 24.0 x 18.0 x 6.0"

    QSC CX404 reviews

    CX404 4-Channel Power Amplifier is rated 5.0 out of 5 by 1.
    Rated 5 out of 5 by from Brute Fprce Amplifier Ive used and specified these CX series amplifiers for years, for installs and live events and they have NEVER let me down. Great amplifier with true power and efficiency.
    Date published: 2012-10-31
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