- Description
Details
The CMX 300Va feature set is 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 CMX 300Va provides unmatched performance, the right power for the job and an affordable price point.
Proven and Reliable Power Plant
CMX 300Va amplifier incorporates 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 CMX 300Va 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.
CMX 300Va amplifier is protected from damage from shorted outputs. Automatic current limiting protects the amplifier from damage until the short is corrected. CMX 300Va amplifier 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 the event of an output circuit failure.
Superior Performance
The CMX 300Va 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.
- Features
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-to-front airflow keep amplifiers and racks cool.
- Specification
Stereo Mode 8Ω / FTC 20 Hz – 20 kHz / 0.1% THD 185 W 8Ω / EIA 1 kHz / 0.1% THD 200 W 4Ω / FTC 20 Hz – 20 kHz / 0.1% THD 280 W 4Ω / EIA 1 kHz / 0.5% THD 300 W 2Ω / EIA 1 kHz / 1% THD 430 W Bridge-Mono Mode 8Ω / FTC 20 Hz – 20 kHz / 0.1% THD 530 W 8Ω / EIA 1 kHz / 0.1% THD 600 W 4Ω / EIA 1 kHz / 1% THD 830 W 70V Direct Drive / EIA 1 kHz / 1% THD 600 W Signal to Noise (20 Hz – 20 kHz, 8Ω) > -100 dB Input Sensitivity at 8Ω 1.15 V (+3.4 dBu) Voltage Gain at 8Ω 31.6 x (30 dB) Output Circuitry Class AB Power Requirement Typical, 1/8 power pink noise at 4Ω, 120 VAC 4.4 A Typical, 1/8 power pink noise at 4Ω, 230 VAC 2.2 A Severe, 1/3 power pink noise at 4Ω, 120 VAC 6.6 A Severe, 1/3 power pink noise at 4ΩΩ, 230 VAC 3.3 A Distortion (SMPTE-M) < 0.02% Distortion (typical) 20 Hz – 20 kHz: 10 dB below rated power < 0.03% THD / 4Ω and 8Ω 1.0 kHz and below: full-rated power < 0.03% THD / 4Ω and 8Ω 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 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™ Controls Front AC switch, Ch. 1 & 2 gain knobs Rear 10-position DIP switch Indicators Power-on Green LED Signal Yellow LED (1 per channel) Clip Red LED (1 per channel) Protect Red LED Amplifier Protection Stable into reactive or mismatched loads Load Protection On/off muting, AC coupling (CMX 300Va and CMX 500Va) Load Protection Triac crowbar (CMX 800Va and CMX 2000Vaon each channel) Power Requirements 120 and 230 VAC, 50 – 60 Hz Dimensions (HWD) 2 RU models 3.5" (89 mm) 2 rack spaces x 19" (483 mm) rack mounting x 15.9" (404 mm) deep to rear support ears Net Weight 35 lbs (15.9 kg) Shipping Weight 41 lbs (18.6 kg) - Reviews
Customer Reviews 1 item(s)
- This is a great system. It has all the power I needed for my application.
- I would recommend Jeff Palladino and Pro Acoustics to anyone who may be thinking about updating an existing audio system or installing a new one. Jeff didn’t tell me what he thought I should have, he walked me through all the different options and explained the pros and cons of each. He made it simple enough for me to understand what would work best for me in my situation. Even after I had paid for the system, but Jeff didn’t stop there. He was always only a phone call away to help with the installation and set-up until everything was exactly the way I wanted it. He even followed up after that to make sure everything was just the way I wanted it to be and I didn’t need any more help. If I ever have any audio needs in the future I will be calling Jeff. The sound is great Jeff, thanks.
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