QSC CX254 4 Channel Power Amplifier

  • $1,835.00


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 lowimpedance 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

  • Compact size — only 2 RU and 14" deep for reduced rack cost and floor space
  • Bridgeable channels 1 + 2 and 3 + 4, for maximum flexibility
  • Active inrush limiting eliminates AC inrush current, removing the need for expensive power sequencers
  • HD15 DataPort connector for Q-SYS networked control and monitoring
  • Custom integrated gain control security cover for tamper-proof installations
  • Variable-speed fan for low noise
  • 1-dB recessed detented gain controls for fast and accurate settings
  • Detachable Euro-style input and output 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)
  • Comprehensive front panel indicators including signal, clip, 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
  • Lightweight—only 21 pounds (9.5 kg) for easier racking and shipping
  • 3-year warranty plus optional 3-year extended service contract
  • A ll CX Series amplifiers meet the European Union's, 2006 RoHS directive to restrict the use of hazardous materials used in electronic devices
8Ω, 20 Hz–20 kHz 0.05% THD 170 W
4Ω, 20 Hz–20 kHz 0.05% THD 250 W
2Ω, 1 kHz 1% THD 450 W
POWER, BRIDGED MONO MODE 16Ω, 20 Hz–20 kHz 0.1% THD: 340 W

8Ω, 20 Hz–20 kHz 0.1% THD: 500 W

4Ω, 1 kHz 1% THD: 900 W

Noise, 20 Hz–20 kHz: >106 dB

Input Sensitivity 1.22 V rms
Maximum Voltage Gain 29 dB
Input Clipping 10 V rms (+22 dBu)
Output Circuitry Class AB+B
Distortion(SMPTE-IM) Less than 0.01%
Distortion(Typical) 20 Hz–20 kHz: 10 dB below rated power - Less than 0.01% THD

1.0 kHz and below: full rated power - Less than 0.01% THD

Frequency Response(typical) 20 Hz–20 kHz, ± 0.2 dB 8 Hz–50 kHz, +0/-3 dB
Damping Factor Greater than 500 (1 kHz and below)
Input Impedance 6 kΩ unbalanced, 12 kΩ balanced
Cooling Variable speed fan, rear to front airflow through tunnel heat sink
Connectors, each channel Input: 3 position Euro-style detachable barrier block, channels 1, 2, 3, 4

DataPort: two HD-15 connectors—Ch 1+2, Ch 3+4

Output: Six-position barrier strip with monitor connections, Ch 1+2, Ch 3+4

Amplifier Protection Full short circuit, open circuit, thermal, ultrasonic, & protection. Stable into reactive or mismatched loads.
Load Protection On/off muting, DC-fault power supply protection
Controls Controls Front: AC switch, four gain knobs

Rear: Two DIP switch gangs—channels 1 and 2; channels 3 and 4: 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

Dimensions 19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 rack spaces), 14" (35.6 cm) deep (from front mounting rails)
Weight 21 lb (9.5 kg) net, 27 lb (12.3 kg) shipping
Power Requirements 100, 120, 230 V AC, 50–60 Hz
Includes (1) QSC CX254 Power Amplifier (1) Operator's Manual (1) IEC Cable (1) Integrated security cover for tamper-proof installations

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