CX 4-Channel

 

 

 

 

Specifications

 

 

 

 

 

 

 

 

 

CX254

CX404

CX204V

Stereo Mode (all channels driven)

 

 

Continuous average output power per channel

 

8Ω / 20 Hz – 20 kHz / 0.05% THD

170 W

250 W

4Ω / 20 Hz – 20 kHz / 0.05% THD

250 W

400 W (0.1% THD, 1 kHz)

2Ω / 1 kHZ / 1% THD

 

 

450 W

70V / 20 Hz – 20 kHz / 0.05% THD

200 W

70V / 1 kHz / 0.05% THD

 

 

220 W

70V / 1 kHz / 1% THD

 

 

300 W

Bridge-Mono Mode

 

 

Bridge-mono mode operation

 

16Ω / 20 Hz – 20 kHz / 0.1% THD

340 W

500 W

8Ω / 20 Hz – 20 kHz / 0.1% THD

500 W

800 W (0.1% THD, 1 kHz)

4Ω / 1 kHz / 1% THD

 

 

900 W

140V / 20 Hz – 20 kHz / 0.1% THD

400 W

140V / 1 kHz / 0.05% THD

 

 

440 W

140V / 1 kHz / 1% THD

 

 

600 W

Noise (20 Hz - 20 kHz)

 

 

-106 dB

-106 dB

-105 dB

Input Sensitivity

 

 

1.22 Vrms

1.22 Vrms

1.26 Vrms

Gain

 

 

29 dB at 8Ω

31 dB at 8Ω

35 db at 70.7V

Input Clipping

 

 

10 Vrms (+22 dBu)

10 Vrms (+22 dBu)

10 Vrms (+22 dBu)

Output Circuitry

 

 

Class AB+B

Class AB+B

Class AB+B

Distortion (SMPTE-IM)

 

 

< 0.01%

< 0.01%

< 0.02%

Distortion (typical)

 

 

 

 

 

20 Hz – 20 kHz: 10 dB below rated power

< 0.01% THD

 

 

1.0 kHz and below: full rated power

< 0.01% THD

 

 

Frequency Response

 

 

20 Hz - 20 kHz, ± 0.2 dB 8 Hz - 50 kHz, + 0/-3 dB

 

Damping Factor

 

 

> 500 (1 kHz and below)

 

 

Input Impedance

 

 

6k ohms unbalanced, 12k ohms balanced

 

Cooling

 

 

Variable-speed fan / rear-to-front air flow through tunnel heat sink

 

Connectors

 

 

Input: 3 position Euro style detachable barrier block, CH 1, 2, 3 & 4 DataPort: HD-15 Connector, Ch 1+2, Ch 3+4

 

 

 

Output: Six-position barrier strip with dual channel and bridge mono connections, Ch 1+2, Ch 3+4

Controls

 

 

Front: AC swith, Ch 1, 2, 3 & 4 gain knobs

 

 

 

 

Rear: DIP switch for Ch 1, 2, 3 & 4, clip limiter on/off, LF filter on/off, LF filter freq select 33 Hz or 75 Hz

 

 

 

CX254 and CX 404: 50 Hz or 75 Hz

CX204V: inputs parallel or stereo, bridge mode

 

Indicators

 

 

Parallel Inputs: Yellow LED / Bridged: Yellow LED/ Power-on: Green LED

 

 

 

 

Clip-Prot: Red LED / Level -10dB: Green LED / Level -20dB: Green LED / Signal -35dB: Green LED (1 per channel)

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)

 

 

3.5" (8.9 cm) 2 RU x 19" (48.3 cm) rack mounting x 14" (35.6 cm) from front mounting rails

Weight - Net / Shipping

 

 

21 lb (9.5 kg) / 27 lb (12.3 kg)

 

 

Power Requirements

 

 

100, 120, 230 VAC, 50 – 60 Hz (configured at factory)

 

120V Current Consumption*

Idle

0.7 A

0.7 A

0.8 A

1/8 power pink noise

8Ω

5.8 A

8.1 A

(typical of program material at

 

 

 

 

 

4Ω

9.2 A

12.4 A

maximum unclipped power)

 

 

 

 

 

2Ω

14.3 A

NR

 

 

70V

8.3 A

1/3 power pink noise

8Ω

8.8 A

12.2 A

(typical of program material

4Ω

14.2 A

19.3 A

with severe clipping)

 

 

 

 

 

2Ω

21.7 A

NR

 

 

70V

12.7 A

* Multiply currents by 0.5 for 230V units

 

 

 

Specifications subject to change without notice.

QSC, the QSC logo and PowerLight are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and other countries.

All other trademarks are the property of their respective owners. Patents may apply or be pending.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174

qscaudio.com

CX 4-channel Spec Sheet - 06/04/08

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QSC Audio CX254, CX404, CX204V warranty Qscaudio.com

CX254, CX204V, CX404 specifications

QSC Audio has established itself as a leader in professional audio solutions, and their CX series amplifiers, including the CX204V, CX254, and CX404, stand out for their performance and versatility. These amplifiers are specifically designed to meet the needs of commercial audio applications, such as in venues, corporate environments, and educational institutions.

The CX204V is a 2-channel amplifier that delivers 200 watts per channel at 4 ohms, making it ideal for smaller venues or installations that require high-quality audio without overwhelming power. One of its key features is the inclusion of built-in DSP (Digital Signal Processing) capabilities, allowing users to optimize their sound with advanced filtering and equalization options. Additionally, the amplifier supports a range of input options, including balanced XLR and 1/4-inch connectors, providing flexibility for various audio setups.

Moving to the CX254, this 2-channel amplifier boosts power output to 250 watts per channel at 4 ohms, making it suitable for larger spaces that necessitate a bit more oomph. The CX254 also includes QSC’s Power Factor Correction technology, which ensures efficient power usage and greater amplification performance, even during demanding situations. Furthermore, it features RS-232 control capabilities, providing users with remote operation options and making integration into existing audio systems seamless.

The CX404 takes things a step further with its 4-channel configuration, delivering 200 watts per channel at 4 ohms. This amplifier is particularly well-suited for multi-zone applications where audio needs to be distributed across various areas. With its advanced overheating protection and short-circuit protection features, the CX404 is built for durability and reliability, ensuring consistent performance without the risk of damage during extended use.

All three amplifiers in the CX series include QSC's innovative Class D topology, offering lightweight and compact design without sacrificing power or audio quality. The CX series is also distinguished by its robust construction, including a rugged chassis designed to withstand the rigors of installation and performance use.

In summary, the QSC Audio CX204V, CX254, and CX404 seamlessly combine power, efficiency, and versatility, making them ideal choices for a variety of commercial audio applications. Their built-in technologies, advanced features, and solid construction emphasize QSC’s commitment to delivering exceptional sound experiences.