QSC CX404
Features
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 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)
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
Lightweight—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.
QSC CX404
SPECIFICATIONS CX204V CX254 CX404 POWER PER CHANNEL, STEREO MODE (all channels driven) 8Ω, 20 Hz–20 kHz 0.05% THD - 170 W 250 W 4Ω, 20 Hz–20 kHz 0.05% THD - 250 W 400 W* 2Ω, 1 kHz 1% THD - 450 W not recommended 70 V, 20 Hz–20 kHz 0.05% THD 200 W - - 70 V, 1 kHz 0.05% THD 220 W - - 70 V, 1 kHz 1% THD 300 W - - POWER, BRIDGED MONO MODE 16Ω, 20 Hz–20 kHz 0.1% THD - 340 W 500 W 8Ω, 20 Hz–20 kHz 0.1% THD - 500 W 800 W* 4Ω, 1 kHz 1% THD - 900 W not recommended 140 V, 20 Hz–20 kHz 0.1% THD 400 W - - 140 V, 1 kHz 0.05% THD 440 W - - 140 V, 1 kHz 1% THD 600 W - - Noise, 20 Hz–20 kHz >106 dB >106 dB >105 dB Input Sensitivity 1.26 V rms 1.22 V rms 1.22 V rms Maximum Voltage Gain 35 dB 29 dB 31 dB Input Clipping 10 V rms (+22 dBu) 10 V rms (+22 dBu) 10 V rms (+22 dBu) Output Circuitry Class AB+B AB+B AB+B Distortion(SMPTE-IM) Less than 0.02% Less than 0.01% Less than 0.01% ALL MODELS Distortion(Typical)
20 Hz–20 kHz: 10 dB below rated power
1.0 kHz and below: full rated power
Less than 0.01% THD
Less than 0.01% THDFrequency 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+4Amplifier 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
Indicators PARALLEL INPUTS: Red LED
BRIDGED: Yellow LED
PWR-ON: Green LEDCLIP/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)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 modeDimensions 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