QSC RMX1450 Power Amplifier (700 Watts)

RMX1450 amplifier is second from top in photo.

Item: QSCRMX1450

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    • $429.00
    • Installment Plan:4 payments of $107.25
    • List: $549.00
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customer reviews

Rate and Review This Product:

51 People rated this product : * * * * * * * * * * 8 out of 10

1 Person wrote a review :

* * * * * * * * * * 3 out of 10

"(((((((((((((((((((((((((((((((OVER RATED))))))))))))))))))))))))))"

Feature:
Nothing to it but the volume nobs, led light for signal and peak, at the back features for stereo, bridge and parallel connection.

Quality:
I must say I am very disappointed in this amplifier, you would have better, much better luck with the Crown Macro Tech Series. The Crown Macro Series are unlikely to peak frequently way above peak wattage stated on the manual which mean low distortion at high volume with a 30 amp fuse mean more power input, in turn means more power output. Which I think everyone wants.

Value:
I honestly think you maybe paying a little more for what this amplifier dishes out. You are just paying the extra money for the name.

Desirability:
I think I wouldnt want another RMX Series unless its power rated at 5000 peak watts like the 5050 rmx, and it was sold to me for $699. Other than that I don't want another QSC amplifier.

Sound:
I've observes and I am sure anyone with the knowledge of amplifiers would agree that the QSC RMX Series peak very quickly, giving the phrase, "Head Room" alot to be desired. There is practically very little "head room", if an amplifier's led light peaks frequently when the volume is pushed, the disappointing issue of distortion that comes with the peak, ie. "Peak Distortion" Its like the wind been punch out of the lungs of the transformer.

Support:
They are reliable strong, but still lack dramatically.

Overall:
I am just disappointed in this product.

Submitted: 7/20/2005

Style of Music: anything and everything

Read all reviews...

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About This Product!
Description
Docs
From Our Catalog
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" deep. And unlike other designs, RMX output devices are direct-mounted to the heat sink for optimum thermal coupling and cooling.

Features
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" 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.

Technical Info

Stereo Mode (EIA: both channels driven)
8 ohms EIA 1 kHz 0.1% THD: 280W
4 ohms EIA 1 kHz 0.1% THD: 450W
2 ohms EIA 1 kHz 1% THD: 700W

Bridge Mono Mode
8 ohms EIA 1 kHz 0.1% THD: 900W
4 ohms EIA 1 kHz 1% THD: 1400W

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

Distortion (SMPTE-IM): Less than 0.01%

Input Sensitivity @ 8 ohms: 1.12v (+3.4 dBu)

Voltage Gain: 40x (32 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.): 7A

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" (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)

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

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

Net Weight: 18.2 kg (40 lbs.)
Steps up the output to 280 watts/channel at 8 ohms, 1400 watts at 4 ohms bridged.

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