QSC CX254 Specifications

The 4-channel CX amplifiers give you four
channels in only two rack spaces, without
compromising on power. Choose from three
models, a direct 70 volt model and two low-
impedance versions. Each model is equipped
with exclusive QSC PowerLight™ switching
power supply technology to virtually eliminate
noise and hum. With high-output power,
versatile loading options, high-thermal capacity
and unmatched reliability, the CX Series is the
perfect solution to any permanently installed
sound system.
CX 4-channel Amplifiers
Watts per channel
Model 70V 8Ω
CX254 − 170
CX404 − 250
CX204V 200 −
20 Hz – 20 kHz, 0.05% THD
*
1 kHz, 1% THD
**
1 kHz, 0.1% THD
Features
• 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 QSControl computer control
• Custom integrated security cover for tamper-proof installations
• Variable speed fan for low noise
• 1 dB 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 (33 Hz or 75 Hz on CX254 and CX404, 50 Hz or
75 Hz on CX204V)
• Comprehensive front panel indicators including signal, clip, protect and QSC's exclusive
bridge-mono and parallel input LEDs
4Ω 2Ω
• Barrier strip output connector
250 450*
• Comprehensive protection circuitry including DC, infrasonic, thermal overload and short
circuit protection
400** −
− − • High-performance Class AB+B complementary bipolar output circuitry
• Lightweight – all models only 21 pounds (9.5 kg) for easier racking and shipping
• 3-year warranty plus optional 3-year extended service contract
CX
4-channel
Professional Power Amplifiers
CX254 | CX404 | CX204V
All models include an
integrated security cover for
tamper-proof installations