User Manual for QSC CMX300Va 430W Professional Power Amplifier Click to enlarge the picture
Contents of the user manual for the QSC CMX300Va 430W Professional Power Amplifier
- Product category: Power Amplifiers QSC
- Brand: QSC
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for QSC Power Amplifiers
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User manual for the QSC CMX300Va 430W Professional Power Amplifier contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any QSC product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official QSC user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a QSC product will considerably shorten its lifespan!
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Product description The CMX300Va 430W Professional Power Amplifier from QSC is a 2RU rugged unit designed to meet the needs of system integrators. This amplifier is used in facilities such as performance halls, houses of worship, sports clubs, gymnasiums, dance venues, pubs, and FGM/BGM systems. The amplifier uses a powerful, high-current toroidal transformer with filtering to ensure generous energy reserves. This allows the amplifier to effortlessly handle high-level transients, even when driving rigorous 2Ω speaker loads. The amplifier output sections feature rugged class AB architecture. Automatic current limiting protects the amplifier from damage until the short is corrected. It also features 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 case of an output circuit breakdown. This CMXa amplifier delivers 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 RU chassis, less than 16" deep. Unlike other designs, CMXa output devices are directly mounted to the heat sink for optimum thermal coupling and cooling. The unit has the ability to directly drive 70 and/or 100V distributed loudspeakers. The CMX 300Va must be configured for bridged-mono operation in order to directly drive high-impedance systems. For installations requiring a transformer isolated output, the CMX has optional accessories to cover your needs. - Flex-use loading options can drive low-impedance loads down to 2Ω and even 70 and 100V distributed loudspeaker systems
- Flex-use input connectivity choices including actively balanced barrier strip, XLR, or 1/4" TRS
- Flex-use output connectivity choices include NL4 Speakon and detachable terminal block
- Rack mountable chassis less than 16" deep
- 1 dB recessed, detented gain control provides 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-to-front airflow prevent amplifiers and racks from overheating
- Used in facilities such as performance halls, houses of worship, sports clubs, gymnasiums, dance venues, pubs, and FGM/BGM systems
UPC: 684284062932 In the Box QSC CMX300Va 430W Professional Power Amplifier (2RU) Limited 3-Year Warranty Table of Contents
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Technical parametersQSC CMX300VA Specs | Watts | 430 W @ 1 kHz, 1% THD | | Stereo FTC Power | 8 Ω / FTC 20 Hz to 20 kHz / 0.1% THD: 185 W
8 Ω / EIA 1 kHz / 0.1% THD: 200 W
4 Ω / FTC 20 Hz to 20 kHz / 0.1% THD: 280 W
4 Ω / EIA 1 kHz / 0.5% THD: 300 W
2 Ω / EIA 1 kHz / 1% THD: 430 W | | Bridge | 8 Ω / FTC 20 Hz to 20 kHz / 0.1% THD: 530 W
8 Ω / EIA 1 kHz / 0.1% THD: 600 W
4 Ω / EIA 1 kHz / 1% THD: 830 W
70 V Direct Drive / EIA 1 kHz / 1% THD: 600 W | | Signal to Noise Ratio | > - 100 dB (20 Hz to 20 kHz, 8Ω) | | Input Sensitivity @ 8 ohms | 1.15 V (3.4 dBu) | | Voltage Gain | At 8 Ω 31.6 x (30 dB) | | Output Circuit | Class AB | | Power Requirements | Typical, 1/8 Power Pink Noise at 4 Ω, 120 VAC: 4.4 A
Typical, 1/8 Power Pink Noise at 4 Ω, 230 VAC: 2.2 A
Severe, 1/3 Power Pink Noise at 4 Ω, 120 VAC: 6.6 A
Severe, 1/3 Power Pink Noise at 4 Ω, 230 VAC: 3.3 A | | Distortion | SMPTE-M: < 0.02%
Typical: 20 Hz to 20 kHz 10 dB below rated power < 0.03% THD / 4 Ω and 8 Ω
1.0 kHz and below full-rated power <0.03% THD / 4 Ω and 8 Ω | | Frequency Response | 20 Hz to 20 kHz: ±1 dB
-3 dB Points: 5 Hz to 50 kHz | | Damping Factor | > 300 at 8 Ω (1 kHz and below) | | Input Impedance | 10 kΩ unbalanced, 20 kΩ balanced | | Input Clipping Level | 10 VRMS (+22 dB) | | Cooling | Continuously variable-speed fan, rear-to-front air flow | | Connectors | Input: Active balanced; barrier strip, XLR and 1/4" (6.3 mm) to TRS tip and XLR pin 2 positive
Output: Detachable terminal block and Neutrik Speakon | | Controls | Front: AC switch, channel 1 & 2 gain knobs
Rear: 10-position DIP switch | | Indicators | Power-On: Green LED
Signal: Green LED (1 per channel)
Clip: Red LED (1 per channel) | | Protection | Amplifier: Stable into reactive or mismatched loads
Load: On/off muting, AC coupling | | Power Requirement | 120 and 230 VAC, 50 to 60 Hz | | Dimensions (H x W x D) | 3.5 x 19.0 x 15.9" (8.9 x 48.3 x 40.0 cm) | | Weight | 35.0 lb (15.9 kg) | | | | Package Weight | 37.5 lb | | Box Dimensions (LxWxH) | 24.0 x 22.0 x 6.0" |
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