QSC RMX 1450a Power Amplifier

The RMX1450a power amplifier steps up the output to 300 watts/channel at 8 ohms; 1400 watts at 4 ohms bridged -- with the low distortion you expect from QSC.


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QSC RMX 1450 Power Amplifier (700 Watts)

No longer available at zZounds
The RMX1450 power amplifier steps up the output to 280 watts/channel at 8 ohms; 1400 watts at 4 ohms bridged -- with the low distortion you expect from QSC.

QSC's RMX Series amplifiers give you clean, dynamic power with the legendary QSC sound quality and reliability that pros depend on. The RMX Series delivers unmatched performance at a 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 them 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.


- 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.

Output Wattage, 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

Output Wattage, 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 VAC, 50-60 Hz
Operating Voltage: 110V
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.)

Note: Register your new product online with QSC and receive a Free 6-Year Extended Warranty upgrade (a $99 value).

For support or warranty questions, please contact the manufacturer:
Phone: 800-772-2834
Web: http://qsc.com/support

Reviewers gave this product an overall rating of 5 out of 5 stars. (80 ratings)
Submitted October 22, 2011 by a customer from yahoo

"Rock Solid +10 value"

Overall: 5 out of 5 stars
(see rating details)
I will use this amp(s) FOREVER... I never expect to replace it (sorry QSC). You have done your job well. If I ever need another one I will look you up. I will tell my friends how happy I am with you and my purchase. Even the one that bought the other brand (actually he is thinking of switching).

These rock and sound great. I am a mobile dj use mp3 format music. I get compliments on my sound quite often. When I switched from vinyl I noticed a difference in the warmth of the sound. No one else, including my clients, noticed the change in sound at all. The Bride, Groom, and their 400+ guests wanted to hear the toast with clarity and accuracy across the entire room. The QSC stuff delivers. Get a snifter of brandy, a good tube amp, your favorite vinyl, and a pair of JBL L65 Jubals if you want oline time warmth, but for all other uses go QSC. I use 2 1450 and 2 1850hd amps for most of my larger gigs. I use EV, B-52 and Cerwin Vega speakers.

Features? I want Power, It has a power switch and 2 gain knobs on the front. Oh yeh and some led'd to indicate power, signal, and clipping... what more could you need? The back has in and out connections with DIP switches for mono bridge and other settings. Any other stuff would be un necessary.

Ease of Use
I read the book... It worked just like the book said.

This product is well read more made. I had 2 of my amps checked by a local service shop. I read a review about how these did not perform as their spec's said they should or would. The reviewer said they clip too soon and the power was over rated. The fact is mine both over performed their ratings. I have never needed service on them either. A friend of mine has similar age and use Crown Amps and has needed service on his a few times. Granted they were fixed and back in 2 weeks at n/c but i prefer no service needed. Crown and QSC stand shoulder to shoulder but I like the QSC from my experience.

Same as the rest.

Manufacturer Support
No I have not needed service.

The Wow Factor
This is a very stylish and sexy 2 knob 1 switch black 2u power amp.

Musical Background:
Mobile DJ / Musician

Musical Style:
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