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Power Amplifier

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2-Channel 70V Power Amplifier
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70 Volt direct drive
Exclusive PowerLight switch-mode power supply technology for high performance and compact size
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
Active inrush limiting eliminates AC inrush current, removing the need for expensive power sequencers
XLR and detachable Euro style input connectors
HD15 DataPort connector for Q-SYS networked control and monitoring
Dip switch control for clip limiters, high pass filters, bridge mono and parallel operation
Selectable high pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (50 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
Compact size - only 2 rack units high and 14" deep for reduced rack cost and floor space
Light weight - weighs 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.

Technical Specifications

SPECIFICATIONSCX302CX502CX702CX902CX1102CX302VCX602VCX1202V POWER PER CHANNEL, STEREO MODE, Both Channels Driven8Ω, 20 Hz–20 kHz, 0.05% THD200 W300 W425 W550 W700 W-550 W700 W4Ω, 20 Hz–20 kHz, 0.05% THD325 W500 W700 W900 W1100 W--1100 W2Ω, 1 kHz, 1% THD600 W800 W1200 W1500 W1700 W---70V, 20 Hz–20 kHz, 0.05% THD400 W
with IT-42*--400 W800 W200 W400 W800 W70 V, 1 kHz, 0.05% THD---440 W1000 W250 W440 W1000 W70 V, 1 kHz, 1% THD---600 W1200 W300 W600 W1200 W POWER, BRIDGED MONO MODE16Ω, 20 Hz–20 kHz, 0.1% THD400 W600 W850 W1100 W1400 W-1100 W1400 W8Ω, 20 Hz–20 kHz, 0.1% THD700 W1100 W1500 W2000 W2200 W--2200 W4Ω, 1 kHz, 1% THD1200 W1600 W2400 W3000 W3400 W---140 V, 20 Hz–20 kHz, 0.05% THD---800 W1600 W400 W800 W1600 W140 V, 1 kHz, 0.05% THD---880 W2000 W500 W880 W2000 W140 V, 1 kHz, 1% THD---1200 W2400 W600 W1200 W2400 WNoise, 20 Hz–20 kHz-107 dB-107 dB-106 dB-106 dB-106 dB-106 dB-106 dB-106 dBInput Sensitivity @ 8 ohms1.26 Vrms1.23 Vrms1.16 Vrms1.17 Vrms1.35 Vrms1.26 Vrms1.26 Vrms1.26 VrmsMaximum Voltage Gain30 dB32 dB34 dB35 dB35 dB35 dB35 dB35 dBOutput Circuitry ClassAB+BAB+BH, 2-tierH, 2-tierH, 2-tierAB+BAB+BH, 2-tier ALL MODELSDistortion (SMPTE-IM)Less than 0.02%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 Response20 Hz–20 kHz, ±0.2 dBDamping Factor

Greater than 500

Input Impedance

6 kΩ unbalanced, 12 kΩ balanced

Input Clipping

10 V rms (+22 dBu)


Variable-speed fan, rear-to-front air flow

Connectors, each channel

Input: 3-pin XLR & 3-pin detachable terminal blocks (1 each per channel)
Output: Safety-shrouded barrier strip

Amplifier Protection

Full short circuit, open circuit, thermal, ultrasonic, and RF protection.
Stable into reactive or mismatched loads.

Load Protection

On/off muting, DC-fault power supply shutdown

Dimensions (HWD) inches

3.5 x 19 x 14 / 2RU

Dimensions (HWD) mm

89 x 483 x 356 / 2RU


21 lb (9.5 kg) net
27 lb (12.3 kg) shipping

* An isolation transformer (the IT-42) is available for the CX302, which converts its low-impedance outputs to isolated 400 W per channel constant-voltage outputs.

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