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QSC RMX850 Amplifier
1 Reviews
rating  5 of 5
MSRP  430.00
Description: Two-channel audio amplifier <br> <br>RMX SPECIFICATIONS <br> <br>RMX 850 <br> <br>STEREO MODE, EIA: Both Channels Driven <br>8 ohms EIA 1 kHz, 0.1% THD <br>200W <br>4 ohms EIA 1 kHz, 0.1% THD <br>300W <br>2 ohms EIA 1 kHz, 1% THD <br>430W <br>BRIDGE MONO MODE <br>8 ohms EIA 1 kHz, 0.1% THD <br>600W <br>4 ohms EIA 1 kHz, 1% THD <br>830W <br>Signal to Noise, 20 Hz-20 kHz <br>100 dB <br>Distortion (SMPTE-IM) <br>Less than 0.01% <br>Input Sensitivity @ 8 ohms <br>1.15v (+3.4 dBu) <br>Voltage Gain <br>31.6x (30 dB) <br>Output Circuitry <br>AB <br>Power Requirements <br>1/8 power pink noise at 4 ohms * <br>5 A <br>Weight <br>35 lb (15.9 kg) net <br>Distortion (Typical) <br> 20 Hz-20 kHz: 10 dB below rated power <br> 1.0 kHz and below: full rated power <br>Less than 0.03% THD 4 and 8 ohms <br>Frequency Response 20 Hz-20 kHz, +/- 1 dB, -3 dB points: 5 Hz-50 kHz <br>Damping Factor, 1 kHz and below Greater than 300 at 8 ohms <br>Input Impedance 10 k ohms unbalanced, 20 k ohms balanced <br>Input Clipping 10 Vrms (+22 dB) <br>Cooling Continuously variable-speed fan, rear-to-front air flow <br>Connectors, each channel Input: Active balanced; barrier strip, XLR and 1/4" (6.3mm) <br>TRS tip and XLR pin 2 positive <br>Output: touch-proof binding posts and Neutrik Speakon <br>Controls Front: AC switch, Ch. 1 and Ch. 2 gain knobs <br>Rear: 10-position DIP switch <br>Indicators Power-On: Green LED Signal: Yellow LED (1 per channel) <br>Clip: Red LED (1 per channel) <br>Amplifier Protection Stable into reactive or mismatched loads <br>Load Protection On/off muting, AC coupling <br>Dimensions 19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 rack spaces), <br>15.9" (40 cm) deep (rack mounting to rear support ears) <br>Power Requirements 100, 120, 230 VAC, 50-60 Hz <br>* @ 120VAC, both channels driven; multiply current by .5 for 230V units <br>


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User Reviews

Overall Rating:5
Value Rating:5
Submitted by Stu-r a AudioPhile

Date Reviewed: September 23, 2007

Bottom Line:   
I bought this amplifier to drive a pair of custom-built dipole systems. The systems sounded great at the lab. But always veiled and somewhat muddy at home. Some other dipole afficionados said I needed more headroom than the 120 watts I was driving them with. My first test of this amplifier was with an OPPO dvd player, playing CDs in stereo. The OPPO is supposed to have some great DACs in it. And I had tried the same setup with the integrated amplifier I subsequently returned because it didn't perform to my expectations. To use it with an A/V receiver, you need preamplifier-outs on the receiver.
For headroom (peak limits), this amplifier is a tough act to follow ... 320 watts at 8 ohms ... 480 watts at 4 ohms ... and 688 watts at 2 ohms. It's as musical as the original ... adding nothing, taking away nothing. It reproduces a piano, a full orchestra, opera, transients, flawlessly. It's neither warm nor cool. It's neutral. It's revealing in that I can discriminate instruments in the orchestra as well as I can at a live performance.

Fan noise is minimal unless you're next to it. To get the unit's full performance, you have to disable the low-frequency filters and the clipping controls with the dip switches provided on the rear of the unit. Connecting cables make a difference. Musical instrument cables didn't seem to perform as well as audio interconnect cables. I settled on 1/4-inch to RCA adaptors and regular audio interconnect cables. Although it's only a two-channel power amplifier, it weighs the same as most 7-channel integrated receivers. It doesn't even get warm after several hours of use.

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Used product for:   Less than 1 month

Duration Product Used:   AudioPhile

Product model year:   2006

Price Paid:    $297.00

Purchased At:   DJdeals.com

Reviews 1 - 1 (1 Reviews Total)

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