QSC RMX1450 Power Amplifier (700 Watts)

• All Products by QSC
• Other Amps by QSC

The 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 breakthrough price.

The 2-channel RMX1450 amplifier delivers 280W at 8 ohms, 450W at 4 ohms, 700W at 2 ohms and 1400W in mono-bridge mode at 4 ohms. 2 RU high and 15.9-in. deep.

FEATURES

• Compact size - up to 2400 watts in 2 rack spaces
• Professional quality performance - incorporates road-proven QSC designs
• High-current toroidal transformers for greater two-ohm power and low noise
• Independent user-defeatable clip limiters reduce distortion
• Selectable low-frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
• Balanced 1/4" (6.3mm) TRS, XLR and barrier strip inputs
• Binding post and Neutrik Speakon outputs
• Front mounted gain controls for easy access
• Signal and Clip LED indicators to monitor performance
• Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers
• 3-year warranty plus optional 3-year extended service contract

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.

Comprehensive Features

The RMX Series is packed full of professional features that increase performance and flexibility:

• The RMX 1850HD provides improved thermal performance that gives you higher continuous power in 2 ohms stereo or 4 ohms bridged applications (a RMX 1850HD exclusive!)
• 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.

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.

QSC RMX1450 Power Amplifier (700 Watts)

• All Products by QSC
• Other Amps by QSC

Specifications

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 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.)