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User Manual for QSC CX254 Four Channel Power Amplifier - 170W per Channel into 8 Ohms Click to enlarge the picture
Contents of the user manual for the QSC CX254 Four Channel Power Amplifier
- Product category: 70-Volt Amplifiers QSC
- Brand: QSC
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for QSC 70-Volt Amplifiers
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User manual for the QSC CX254 Four Channel Power Amplifier contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any QSC product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official QSC user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a QSC product will considerably shorten its lifespan!
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Product description 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
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Technical parametersQSC CX254 Specs | 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 | | | | Package Weight | 27.0 lb | | Box Dimensions (LxWxH) | 24.0 x 18.0 x 5.5" |
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