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Home>Live Sound/PA>Power Amps

QSC RMX 850 Power Amplifier (430 Watts)

Intensify your audio with this QSC power amp. Its pumps 430W at 2 ohms and features defeat able clip limiters for minimal distortion and optimal performance. 81 People rated this product: Rate and Review This Product
Ships to: Can ship to United States Can ship to APO/FPO
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Manufacturer's Description for QSC RMX850 Power Amplifier (430 Watts)

The new RMX Series amplifiers give you clean, dynamic power with the legendary QSC sound quality and reliability that pros depend on. The RMX Series deliver unmatched performance at a new breakthrough price.

Muscular Power Plant

The power supply is the heart of an amplifier, converting raw AC power from the wall to clean DC for the audio circuitry. The RMX uses a powerful high-current toroidal transformer and ample filter capacitance to ensure generous energy reserves. This makes a critical difference in sound quality, allowing the amp to effortlessly punch out high-level transients, even when driving abusive 2-ohm speaker loads.

Superior Performance

RMX amplifiers deliver true studio-quality sound. A full, complementary output circuit using the highest-grade linear output devices delivers ultra-low distortion (<0.05% THD) and a ruler-flat frequency response. SMT (Surface Mount Technology) triples small-signal component density, enabling us to pack up to 2400 watts of power in a chassis only 2 rack spaces and less than 16 in. deep. And, unlike other designs, RMX output devices are direct-mounted to the heat sink for optimum thermal coupling and cooling.

Features

- The RMX Series is packed full of professional features that increase performance and flexibility:
- Independent defeatable clip limiters reduce distortion without sacrificing peak performance.
- Selectable low-frequency filters boost system response, protect speakers, and ensure low-end tightness by more precisely matching the amplifier's range to the loudspeakers.
- Barrier strip, XLR, and 1/4 in. balanced inputs plus Speakon and binding post outputs provide easy connections.
- Low-noise variable speed fans with rear-to-front air flow keep amplifiers and racks cool.

Proven Reliability

With over 30 years of building amplifiers for the largest touring companies and venues around the world, you can count on QSC's reputation for designing the most reliable amps available. zZounds is an authorized dealer of QSC products.
Continuous Rating
8 ohms: 200W

4 ohms: 300W

2 ohms: 430W

8 ohms Bridge Mono: 600W

4 ohms Bridge Mono: 830W

Signal to Noise (20 Hz-20 kHz): 100 dB

Distortion (SMPTE-IM): Less than 0.01%

Input Sensitivity @ 8 ohms: 1.15v (+3.4 dBu)

Voltage Gain: 31.6x (30 dB)

Output Circuitry: AB

Current Consumption (1/8 power pink noise at 4 ohms @ 120VAC,

both channels driven; multiply current by .5 for 230V units.): 5A

Weight (Net): 35 lbs. (15.9 kg)

Distortion (typical):
20 Hz-20 kHz: 10 dB below rated power: Less than 0.03% THD 4 and 8 ohms
1.0 kHz and below: full rated power: Less than 0.03% THD 4 and 8 ohms

Frequency Response:
20 Hz-20 kHz, 0/-1 dB, -3 dB points: 5 Hz-50 kHz
Damping Factor (1 kHz and below): Greater than 300 at 8 ohms

Input Impedance: 10 K ohms unbalanced, 20 K ohms balanced

Input Clipping: 10 Vrms (+22dBu)

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

Connectors (each channel):

Input: Active balanced; barrier strip, XLR, and 1/4 in. (6.3 mm)
TRS tip and XLR pin 2 positive

Output: "Touch-proof" binding posts and Neutrik Speakon

Controls:
Front: AC switch, Ch. 1, and Ch. 2 gain knobs
Rear: 10-position DIP switch

Indicators:
PWR-ON: Green LED SIGNAL: Yellow LED (1 per channel)
CLIP: Red LED (1 per channel)
Amplifier Protection: Full short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads.

Load Protection: Turn-on/off muting, AC coupling (850, 1450), triac crowbar (2450, on each channel)

Dimensions:
19 in. (48.3 cm) rack mounting, 3.5 in. (8.9 cm) tall (2 rack spaces),
15.9 in. (40 cm) deep (rack mounting to rear support ears)

Power Requirements: 100, 120, 230 VAC, 50-60 Hz

Note: Register your new product online with QSC and receive a Free 6-Year Extended Warranty upgrade (a $99 value).
Dimensions and Weight in Packaging
Shipping Weight: 39 lbs
Shipping Dimensions: 24 x 22 x 6 in
QSC Warranty
QSC Warranty
If you have additional warranty questions, please call the manufacturer at 800-772-2834
Our extended 30-Day 100% Satisfaction Guarantee applies on this product. Buy it, and if it isn't just right for you, return it!
What Our Customers Are Saying About zZounds "zZounds was the only site that had what I wanted in stock when I needed it. As long as they can keep delivering the goods when it counts, I will be a zZounds customer." - customer on January 23rd, 2012
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Customer Reviews
4.5 out of 5 (81 ratings) Rate and Review This Product
zZounds has verified that this customer bought this product from us. "QSC amp is a sound value"
Sound: I've used Peavey and Crown amps in the past to push our sound system (6 loudspeakers w/4 10" and 3 horns on each & 1 Peavey monster subwoofer) and have had good experiences. At the recommendation of a colleague I went with QSC this time around and am very impressed with the quality of sound. I think it is at least equal to my Crown, better than my Peavey. Feature: This amp has all the features I need. Peavey amps tend to have better features - cooling system is better in my opinion -- but the QSC has all the options I need with bridging, inputs, outputs, clip, etc. Ease of Use: Most good amps generally plug and play... this is no different. Quality: Constructed well, sound quality is good, and more amps per channel than Peavey amp, equal to Crown. Value: Between sound quality, amps per channel, construction, and features, QSC is the best value on the market. Manufacturer Support: Haven't had to deal with them. The Wow Factor: No regrets - I will purchase QSC next time I'm in the market with my experience so far. Overall: I'm very hapy with the product. Overall I rate it as high as I can.
Style of Music: Electronic
9 of 9 people (100%) found this review helpful. Did you?
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zZounds has verified that this customer bought this product from us. "Reliable power amplifier with good, clean sound."
Sound: Currently using it in a home studio. Frequency response is good and it produces a nice, clean sound to my studio monitor speakers. Feature: Most useful: connectivity; front exhausting cooling fans; configuration capabilities. Nice having a front-mounted power switch. Ease of Use: Using it is as easy as it comes. Turn it on and it works - reliably. The only learning curve would be in the initial configuration as regards determining the type of cables/connectors and the appropriate dipswitch settngs for the particular application. Quality: Built like a tank. A bit on the heavy side, but I would expect it to last many years. Value: Yes. It's a quality amplifier from a quality company. Manufacturer Support: Have installed many of these amplifiers when working for a video systems integrator and haven't really had any problems that required calling the service department. The Wow Factor: Was using lesser cost alternatives until I could afford to upgrade. There has been a noticeable improvement in the quality of the sound since incorporating it into my home studio. Overall: Always have had good success with many different QSC products. I would expect it to keep working for a long time and should it need replacing for whatever reason, I would buy from them again. For my particular application, the only negatives I have found are a) the weight, although this could also be considered a positive from the standpoint of reliability; and b) the fans are a bit noisy if mounted directly in the mixing space.
Style of Music: Combination of jazz, rock, new age, environmental, movie underscore
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No interest. Ever.
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