Description

The QSC RMX 2450a is a rugged, high-powered professional amplifier engineered to deliver clean, dynamic audio performance with the legendary sound quality and reliability QSC is known for. Offering up to 2400 watts of power in a compact 2U chassis, the RMX 2450a is ideal for a wide range of live sound reinforcement and installed applications. Its high-current toroidal power supply ensures low noise and excellent low-frequency performance, while advanced protection circuitry and ultra-low distortion guarantee superior sound reproduction, even under demanding 2 ohms loads.

Key Features

Delivers up to 2400 watts in bridge mono mode (4 ohms)

Up to 750 watts per channel at 4 ohms stereo

High-current toroidal transformers for better 2 ohms power and low noise

Independent defeatable clip limiters to reduce distortion

Selectable 30 Hz and 50 Hz low-frequency filters for speaker protection

Balanced XLR, 1/4″ TRS, and barrier strip inputs

Touch-proof binding posts and Neutrik Speakon® outputs

Front-mounted gain controls with signal and clip LEDs

DC and thermal overload protection on each channel

Compact 2U rack design

3-year warranty, with optional 3-year extended coverage

Power Ratings (Stereo Mode, Both Channels Driven)

500 W per channel @ 8 ohms (EIA 1 kHz, 0.1% THD)

750 W per channel @ 4 ohms (EIA 1 kHz, 0.1% THD)

1200 W per channel @ 2 ohms (EIA 1 kHz, 1% THD)

Power Ratings (Bridge Mono Mode)

1500 W @ 8 ohms (EIA 1 kHz, 0.1% THD)

2400 W @ 4 ohms (EIA 1 kHz, 1% THD)

Performance Specifications

Frequency Response: 20 Hz – 20 kHz (+0/-1 dB)

Signal to Noise Ratio: -100 dB

THD (typical): < 0.03%

SMPTE-IM Distortion: < 0.02%

Input Sensitivity: 1.23V (+4 dBu) @ 8 ohms

Voltage Gain: 50x (34 dB)

Damping Factor (1 kHz and below): > 300 @ 8 ohms

Input Impedance: 10k ohms unbalanced / 20k ohms balanced

Input Stage Clipping: 10 V RMS (+22 dBu)

Protection & Monitoring

Protection: Short circuit, open circuit, thermal, ultrasonic, RF

Load Protection: Turn-on/off muting, AC coupling, Triac crowbar

Indicators:

Power (Green)

Signal (Yellow, per channel)

Clip/Protect (Red, per channel)

Connections

Inputs: XLR, 1/4” TRS, and barrier strip

Outputs: Touch-proof binding posts and Neutrik Speakon®

Cooling & Power Requirements

Cooling: Variable-speed fan, back-to-front airflow

Power Draw @ 4 ohms:

Typical (1/8 power pink noise): 6.3 A

Severe (1/3 power pink noise): 15.6 A

Power Supply: 100/120/230V AC (factory configured), 50–60 Hz

Dimensions & Weight

Height: 3.5 in (2U rack)

Depth: < 16 in

Net Weight: 44.5 lbs (20.2 kg)