QSC CX254 Four Channel Power Amplifier

QSC CX254 Four Channel Power Amplifier - 170W per Channel into 8 Ohms

QSC CX254 Four Channel Power Amplifier - 170W per Channel into 8 Ohms

B&H # QSCX254 MFR # CX254
QSC CX254 Four Channel Power Amplifier

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  • 1Description

The QSC CX254 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 CX254 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 thermal heat buildup and improved signal reproduction.

The CX254 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 CX254 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.

Lightweight 4-channel power amplifier with 170 Watts per channel at 8 Ohms
Integrated security cover for "set and forget" tamper-proof installation
Proprietary PowerWave switch-mode power supply technology for efficient performance and compact size
Innovative Active Inrush Limiting design eliminates AC inrush current, eliminates cost of and need for expensive power sequencers
Varispeed fan cooling with rear to front airflow and front panel grill
HD15 DataPort connectors for QSControl computer software integration, control of installed setups
Channels 1 and 2, 3 and 4 Bridged, Stereo, and Parallel switching
Individual Channel DIP switch control for clip limiters, high pass filters, bridge-mono and parallel operation
Selectable high-pass filters protect speakers, prevent speaker transformer saturation with minimal effect on program material
Comprehensive protection circuitry includes DC, infrasonic, thermal overload and short circuit protection
Dedicated front panel indicators include Signal, Clip/Protect, unique Bridge-Mono and Parallel LEDs
Individual front panel 1 dB detented rotary gain controls for simplified, more precise settings
Detachable Euroblock input connectors
Unified Barrier Strip output connector
UPC: 684284001245
In the Box
QSC CX254 Four Channel Power Amplifier - 170W per Channel into 8 Ohms
  • Power Cable
  • Owner's Manual
  • 3 Year Warranty
  • Table of Contents
    • 1Description
    Power Rating Stereo @ 2 Ohms: 450 Watts per Channel
    Stereo @ 4 Ohms: 250W per Channel
    Stereo @ 8 Ohms: 170W per Channel
    Bridge-Mono @ 4 Ohms: 900W per Channel
    Bridge-Mono @ 8 Ohms: 500W per Channel
    Bridge-Mono @ 16 Ohms: 340 Watts per Channel
    Damping Factor >500(1kHz and below)
    Input Sensitivity 1.22 Vrms
    Input Impedance 12 kohms(Balanced)
    6 kohms(Unbalanced)
    Gain 29dB @ 8 ohms
    Frequency Response 20Hz - 20kHz, +/- 0.2 dB
    8Hz - 50kHz, +0, -3 dB
    Signal-to-Noise Ratio Not Specified by Manufacturer
    Total Harmonic Distortion (THD) <0.01%, 10db Below Rated Power, 20Hz - 20kHz
    <0.01%, Full Rated Power, 1kHz and below
    Input Connections 4 x 3-Position Euroblock Connectors
    2 x Dataport HD-15(Channel 1+2, Channel 3+4)
    Output Connectors 1 x 6-Position Barrier Strip with Monitor Connections(Channel 1+2, Channel 3+4)
    Controls Front Panel 1 x Power Switch
    4 x Rotary Gain Knobs
    Controls (Rear) 2 x Clip Limiter On/Off Switches
    2 x LF Filter On/Off Switch
    2 x LF 33Hz or 75Hz Frequency Select Switch
    2 x Parallel or Stereo Input Select Switches
    1 x Bridge Mode Select Switch
    (Note: Switches above are duplicate DIP Switch sets for Channel 1+2, Channel 3+4)
    Indicators 1 x Green Power On LED Indicator Lights
    2 x Yellow Bridged MODE LED Indicator Lights(Channel 1+2, 3+4)
    2 x Red Parallel Mode LED Indicator Lights(Channel 1+2, 3+4)
    4 x Red Clip/Protect LED Indicator Lights
    4 x Yellow Level -10dB LED Indicator Lights
    4 x Yellow Level -20dB LED Indicator Lights
    4 x Green Signal -35dB LED Indicator Lights
    Cooling Variable Speed Fan, Rear to Front Airflow through Tunnel Heat Sink
    Power Consumption 14.3A(2 Ohms Stereo, 120V)
    9.2A(4 Ohms Stereo, 120V)
    5.8A(8 Ohms Stereo, 120V)
    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 Info
    Package Weight 27.0 lb
    Box Dimensions (LxWxH) 24.0 x 18.0 x 5.5"

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