QSC CMX2000Va User Manual

CMXa Series

CMX 300Va | CMX 500Va | CMX 800Va | CMX 2000Va

Professional Power Amplifiers

CMX 300Va | CMX 500Va | CMX 800Va | CMX 2000Va

Features

• “Flex-Use” loading options allow you to drive low-impedance loads down to 2 ohms and certain models to drive 70 and 100V distributed loudspeaker systems

• “Flex-Use” Input connectivity choices including actively balanced barrier strip, XLR, or ¼" TRS

• “Flex-Use” Output connectivity choices include NL4 Speakon™ and detachable terminal block

• Rack mountable with chassis less than 16" or 40.6 mm deep

• 1 dB recessed, detented gain controls for fast, accurate and repeatable settings

• Tamper-proof security cover for gain controls

• Recessed rear DIP switches for easy selection of stereo, parallel, or bridged mode operation, and the additional choice of enabling/disabling low frequency filter protection

• Low-noise variable-speed fans with rear-tofront airflow keep amplifiers and racks cool

The New CMXa Series is an economical and rugged power amplifier designed to meet the needs of system integrators. It is based upon the proven, rock-solid, reliable performance found in the award winning RMX Series. The CMXa feature sets are designed for wide-ranging application in facilities such as performance halls, houses of worship, sports clubs, gymnasiums, dance venues, pubs, and FGM/BGM systems. The CMXa Series provides unmatched performance, the right power for the job and an affordable price point.

Proven and Reliable Power Plant

CMXa amplifiers incorporate everything QSC has learned in more than forty years of striving to deliver worry-free operations without failures. The design of these amplifiers starts with our world-class power supplies. The CMXa uses a powerful, high-current toroidal transformer and filtering to ensure generous energy reserves. This allows the amplifiers to effortlessly handle high-level transients, even when driving abusive 2 ohm speaker loads.

The amplifier output sections feature rugged class AB and class H architecture depending on power level. Efficient class H output sections on the CMX 800Va and CMX 2000Va reduce AC current draw and cut down on waste heat.

All CMXa amplifiers are protected from damage from shorted outputs. Automatic current limiting protects the amplifier from damage until the short is corrected.

CMXa amplifiers also feature DC protection systems to prevent loudspeaker damage in

the unlikely event of an output transistor failure. DC voltage from the power supply is never passed directly to your speakers, even in the event of an output circuit failure.

Superior Performance

The CMXa amplifiers deliver true and accurate studio-quality sound. A full complementary output circuit using high-grade linear output devices generates accurate, flat-frequency response with low distortion. SMT (Surface Mount Technology) triples small-signal component density, enabling high power output in a 2 rack unit chassis (3 RU for the CMX 2000Va). Unlike other designs, CMXa output devices are directly mounted to the heat sink for optimum thermal coupling and cooling.

The CMXa Series is available in four models. Three 2-rackspace models range in power from 300 to 800 watts per channel at 4 ohms. One 3-rackspace model provides 2500 watts per channel at 2 ohms. All four models feature a compact chassis less than 16” deep.

The V in the model name designates the ability to directly drive 70-volt and/or 100-volt distributed loudspeakers. The CMX 300Va and CMX 500Va must be configured for bridgedmono operation in order to directly drive high-impedance systems while the CMX 800Va and 2000Va may be used in either stereo or mono mode.

For installations requiring a transformer isolated output, the CMX has optional accessories to cover your needs.

CMXa Power Amplifiers

Watts per channel 2RU Models 8Ω 4Ω* 2Ω** Bridged 4Ω**

CMX 300Va 200 300 430 830

CMX 500Va 300 500 700 1400

CMX 800Va 500 800 1200 2400

Watts per channel 3RU Model 8Ω 4Ω** 2Ω** Bridged 4Ω**

CMX 2000Va 1100 2000 2500 5000

1 kHz, 0.1% THD *1 kHz, 0.5% THD **1 kHz, 1% THD

CMXa Details

CM X300Va CMX 500Va CMX 800Va CMX 2000Va

Stereo Mode (both channels driven)

8Ω / FTC 20 Hz – 20 kHz / 0.1% THD 8Ω / EIA 1 kHz / 0.1% THD 4Ω / FTC 20 Hz – 20 kHz / 0.1% THD 4Ω / EIA 1 kHz / 0.5% THD 2Ω / EIA 1 kHz / 1% THD 70V Direct Drive / EIA 1 kHz / 1% THD 100V Direct Drive / EIA 1 kHz / 1% THD

Bridge Mono Mode

8Ω / FTC 20 Hz – 20 kHz / 0.1% THD 8Ω / EIA 1 kHz / 0.1% THD 4Ω / EIA 1 kHz / 1% THD 70V Direct Drive / EIA 1 kHz / 1% THD 100V Direct Drive / EIA 1 kHz / 1% THD

Signal to Noise (20 Hz – 20 kHz, 8Ω) > -100 dB > - 100 dB > - 100 dB > - 100 dB

Input Sensitivity at 8Ω 1.15 V (+3.4 dBu) 1.14 V (+3.4 dBu) 1.23 V (+4.0 dBu) 1.42 V (+5.3 dBu)

Voltage Gain at 8Ω 31.6 x (30 dB) 40 x (32 dB) 46 x (33 dB) 64 x (36 dB)

Output Circuitry Class AB Class AB 2-tier Class H 3-tier Class H

Power Requirements

Typical, 1/8 power pink noise at 4Ω, 120 VAC Typical, 1/8 power pink noise at 4Ω, 230 VAC Severe, 1/3 power pink noise at 4Ω, 120 VAC Severe, 1/3 power pink noise at 4ΩΩ, 230 VAC

Distortion (SMPTE-M) < 0.02% < 0.01% < 0.01% < 0.01%

Distortion (typical)

20 Hz – 20 kHz: 10 dB below rated power

1.0 kHz and below: full-rated power

Frequency Response 20 Hz – 20 kHz: ±1 dB -3 dB points: 5 Hz – 50 kHz

Damping Factor (1 kHz and below) > 300 at 8Ω

Input Impedance 10k ohms unbalanced, 20k ohms balanced

Input Clipping 10 Vrms (+22 dB)

Cooling Continuously variable-speed fan, rear-to-front air flow

Connectors (each channel) Input: Active balanced; barrier strip, XLR and ¼" (6.3 mm) – TRS tip and XLR pin 2 positive

Controls Front: AC switch, Ch. 1 & 2 gain knobs

Indicators Power-on: Green LED / Signal: Green LED (1 per channel) / Clip: Red LED (1 per channel)

Amplifier Protection Stable into reactive or mismatched loads

Load Protection On/off muting, AC coupling (CMX 300Va and CMX 500Va), triac crowbar (CMX 800Va and CMX 2000Va

Power Requirements 120 and 230 VAC, 50 – 60 Hz

Dimensions (HWD)

2 RU models 3 RU model (CMX 2000Va)

185 W 200 W 280 W 300 W 430 W – –

530 W 600 W 830 W 600 W –

4.4 A

2.2 A

6.6 A

3.3 A

260 W 300 W 400 W 500 W 700 W – –

800 W 900 W 1400 W 1200 W 600 W

5.4 A

2.7 A

9.6 A

4.8 A

450 W 500 W 650 W 800 W 1200 W 400 W –

1300 W 1500 W 2400 W 2000 W 2300 W

6.3 A

3.2 A

15.6 A

7.8 A

1050 W 1100 W 1600 W 2000 W (1% THD) 2500 W 2500 W 1000 W

3200 W 3600 W 5000 W 5000 W 3600 W

13.9 A 7 A

26.9 A

13.5 A

< 0.03% THD / 4Ω and 8Ω < 0.03% THD / 4Ω and 8Ω

Output: Detachable terminal block and Neutrik™ Speakon™

Rear: 10-position DIP switch

on each channel)

3.5" (8.9 cm) 2 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep to rear support ears

5.25" (13.3 cm) 3 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep to rear support ears

Weight - Net 35 lb (15.9 kg) 40 lb (18.2 kg) 44.5 lb (20.2 kg) 75 lb (33.1 kg)

Weight - Shipping 41 lb (18.6 kg) 46 lb (20.9 kg) 50.5 lb (23 kg) 87 lb (37.2 kg)

Specifications subject to change without notice.

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

office and other countries. Speakon is a trademark of Neutrik. All other trademarks are the property of their respective owners. Patents may apply or be pending.

CMXa Spec Sheet 08/9/2013

please recycle