QSC CMX500VA Spec sheet
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QSC CMX800VA is a professional power amplifier designed for a wide range of applications, from performance halls to sports clubs and gymnasiums. It offers "Flex-Use" loading options, allowing you to drive low-impedance loads down to 2 ohms and also 70 and 100V distributed loudspeaker systems. Input and output connectivity options include actively balanced barrier strip, XLR, ¼" TRS, NL4 Speakon™, and detachable terminal block.
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CMX 300Va | CMX 500Va | CMX 800Va | CMX 2000Va
CMXa Series
CMX 300Va | CMX 500Va |
CMX 800Va | CMX 2000Va
Professional Power Amplifiers
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
2RU Models
CMX 300Va
CMX 500Va
Watts per channel
8Ω
200
300
4Ω*
300
500
2Ω**
430
700
CMX 800Va
3RU Model
CMX 2000Va
500 800 1200
Watts per channel
8Ω 4Ω** 2Ω**
1100 2000 2500
1 kHz, 0.1% THD *1 kHz, 0.5% THD **1 kHz, 1% THD
Bridged 4Ω**
830
1400
2400
Bridged 4Ω**
5000
CMXa Details
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)
Input Sensitivity at 8Ω
Voltage Gain at 8Ω
Output Circuitry
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)
Distortion (typical)
20 Hz – 20 kHz: 10 dB below rated power
1.0 kHz and below: full-rated power
Frequency Response
Damping Factor (1 kHz and below)
Input Impedance
Input Clipping
Cooling
Connectors (each channel)
Controls
Indicators
Amplifier Protection
Load Protection
Power Requirements
Dimensions (HWD)
2 RU models
3 RU model (CMX 2000Va)
Weight - Net
Weight - Shipping
CM X300Va CMX 500Va CMX 800Va CMX 2000Va
185 W
200 W
280 W
300 W
430 W
–
–
530 W
600 W
830 W
600 W
–
> -100 dB
1.15 V (+3.4 dBu)
31.6 x (30 dB)
Class AB
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
> - 100 dB
1.14 V (+3.4 dBu)
40 x (32 dB)
Class AB
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
> - 100 dB
1.23 V (+4.0 dBu)
46 x (33 dB)
2-tier Class H
6.3 A
3.2 A
15.6 A
7.8 A
< 0.02%
< 0.03% THD / 4Ω and 8Ω
< 0.03% THD / 4Ω and 8Ω
< 0.01%
20 Hz – 20 kHz: ±1 dB -3 dB points: 5 Hz – 50 kHz
> 300 at 8Ω
10k ohms unbalanced, 20k ohms balanced
10 Vrms (+22 dB)
< 0.01% < 0.01%
Continuously variable-speed fan, rear-to-front air flow
Input: Active balanced; barrier strip, XLR and ¼" (6.3 mm) – TRS tip and XLR pin 2 positive
Output: Detachable terminal block and Neutrik™ Speakon™
Front: AC switch, Ch. 1 & 2 gain knobs
Rear: 10-position DIP switch
Power-on: Green LED / Signal: Green LED (1 per channel) / Clip: Red LED (1 per channel)
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
> - 100 dB
1.42 V (+5.3 dBu)
64 x (36 dB)
3-tier Class H
13.9 A
7 A
26.9 A
13.5 A
Stable into reactive or mismatched loads
On/off muting, AC coupling (CMX 300Va and CMX 500Va), triac crowbar (CMX 800Va and CMX 2000Va on each channel)
120 and 230 VAC, 50 – 60 Hz
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
35 lb (15.9 kg)
41 lb (18.6 kg)
40 lb (18.2 kg)
46 lb (20.9 kg)
44.5 lb (20.2 kg)
50.5 lb (23 kg)
75 lb (33.1 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
© 2013 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark 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
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