QSC RMX 2450

2400W, 2 Channel Power Amplifier

Shop all QSC

2 Channel Power Amplifier • 1400 Watts • Independent Defeatable Clip Limiters • Barrier Strip, XLR and 1/4" Balanced Inputs • Independent DC and Thermal Overload Protection

Learn more about the rmx2450

We apologize

This item has been discontinued


True Studio Quality Sound

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.

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.

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.

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
General 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 Manufacturer's warranty
RMX 850 RMX 1450 RMX 1850HD RMX 2450
  STEREO MODE (Both Channels Driven)
8 ohms
  FTC 20 Hz - 20 kHz, 0.1% THD
  EIA 1 kHz, 0.1% THD

185 W
200 W

260 W
280 W

350 W
360 W

450 W
500 W
4 ohms
  FTC 20 Hz - 20 kHz, 0.1% THD
  EIA 1 kHz, 0.1% THD

280 W
300 W

400 W
450 W

550 W
600 W

650 W
750 W
2 ohms
   EIA 1 kHz, 1% THD

430 W

700 W

900 W

1200 W
8 ohms
  FTC 20 Hz - 20 kHz, 0.1% THD
  EIA 1 kHz, 0.1% THD

530 W
600 W

800 W
900 W

1100 W
1200 W

1300 W
1500 W
4 ohms
   EIA 1 kHz, 1% THD

830 W

1400 W

1800 W

2400 W
Signal to Noise, 20 Hz-20 kHz 100 dB 100 dB 100 dB 100 dB
Distortion (SMPTE-IM) Less than 0.01% Less than 0.01% Less than 0.02% Less than 0.02%
Input Sensitivity @ 8 ohms 1.15V (+3.4 dBu) 1.15V (+3.4 dBu) 1.16V (+3.5 dBu) 1.23V (+4.0 dBu)
Voltage Gain 31.6x (30 dB) 40x (32 dB) 46x (33 dB) 50x (34 dB)
Output Circuitry AB AB Class H Class H
Power Requirements
1/8 power pink noise at 4 ohms *
5A 6A 6A 7A
Distortion (Typical)
  20 Hz - 20 kHz: 10 dB below rated power
  1.0 kHz and below: full rated power

Less than 0.03% THD, 4 and 8 ohms
Less than 0.03% THD, 4 and 8 ohms
Frequency Response 20 Hz-20 kHz, ±1 dB
-3 dB points: 5 Hz - 50 kHz
Damping Factor, 1 kHz and below Greater than 300 at 8 ohms
Input Impedance 10k ohms unbalanced, 20k ohms balanced
Input Clipping 10 Vrms (+22 dB)
Cooling Continuously variable-speed fan, rear-to-front air flow
Connectors, each channel Input: Active balanced; barrier strip, XLR and 1/4" (6.3mm)
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 Power-On: Green LED
Signal: Yellow LED (1 per channel)
Clip: Red LED (1 per channel)
Amplifier Protection Stable into reactive or mismatched loads
Load Protection On/off muting, AC coupling (850, 1450), triac crowbar (1850HD, 2450, on each channel)
Power Requirements 100, 120, 230 VAC, 50-60 Hz
Dimensions 19" (48.3 cm) rack mounting, 3.5" (8.9 cm) tall (2 RU),
15.9" (40 cm) deep (rack mounting to rear support ears)
Weight 35 lbs (15.9 kg) net 40 lbs (18.2 kg) net 44.5 lbs (20.2 kg) net 44.5 lbs (20.2 kg) net

Specifications & Details

Power Specifications
Number of Channels
2 Channels
Continuous Power @ 8 ohm
500 watts x 2 channel
Continuous Power @ 4 ohm
750 watts x 2 channel
Continuous Power @ 2 ohm
1200 watts x 2 channel
Continuous Power @ 8 ohm (Bridged)
1500 watts x 1 channel
Continuous Power @ 4 ohm (Bridged)
2400 watts x 1 channel
Total Continuous Power
2400 watts
Amplifier Specifications
Amplifier Class
Signal-to-Noise Ratio
100 dB
Frequency Response
20 - 20000 Hz
THD (Total Harmonic Distortion)
Voltage Gain
34 dB
Cooling Options
Cooling Fan
1/4" TRS
Binding Posts
Binding Posts (Banana Clip Ready)
Physical Specifications
Weight (Pounds)
44.5 lbs
Rackmount Spaces
Warranty and Return Policy
Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider

Item Details



Model Number:

RMX 2450



Internal SKU:


Internal Product ID:


Customer Ratings & Reviews

5 star
4 star
3 star
2 star
1 star


Customer Reviews

Sort by:


great amplifier

Pros: plenty of power, great build quality

Cons: the gain knobs makes a scratching sound while turning them

By trvs19 on April 30, 2011


found this helpful.

Related Searches

RMX 2450 small

Item added to your cart.

Price: $699.00

Save up to 10 different vehicles in your garage

Add vehicle
Identify your vehicle and submodel details
  • Owner’s manual
  • Vehicle’s insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver’s side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon