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QSC RMX2450a

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Product Description

QSC RMX2450A   ( QSC RMX2450-A )


Compact size — up to 2500 watts in two rack spaces, or 5000 watts in three rack spaces
High-current toroidal transformers, for greater 2-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
The 4000-watt RMX4050a operates on a standard 15 amp plug (120V)
Both the RMX4050a and the RMX5050a feature a dual mono, high-current power supply for increased reliability and performance
The RMX4050a's particularly exceptional combination of cooling capacity and electrical efficiency provides robust thermal performance suitable for high continuous power in 2-ohm stereo or 4-ohm bridged applications.
Balanced 1/4” (6.3 mm) TRS, XLR, and barrier strip inputs
Touch-proof binding post and Neutrik Speakon® outputs
Front mounted gain controls for easy access
Signal and clip LED indicators for monitoring 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


Power Rating

Stereo mode (both channels driven)
8 Ω FTC 20 to 20,000 Hz at 0.1% THD: 450 W
8 Ω EIA 1,000 Hz at 0.1% THD: 500 W
4 Ω FTC 20 to 20,000 Hz at 0.1% THD: 650 W
4 Ω EIA 1,000 Hz at 0.1% THD: 750 W
2 Ω EIA 1,000 Hz at 0.1% THD: 1200 W

Bridge-mono mode 8 Ω FTC 20 to 20,000 Hz at 0.1% THD: 1300 W
Bridge-mono mode 8 Ω EIA 1,000 Hz at 0.1% THD: 1500 W
Bridge-mono mode 4 Ω EIA 1,000 Hz at 0.1% THD: 2400 W
Signal-to-Noise Ratio > -100 dB

SMPTE-IM: < 0.02%

For 8 and 4 Ω load
THD for 20 to 20,000 Hz at 10 dB below rated power: less than 0.03%
THD for 1,000 Hz at full rated power: less than 0.03%

Input Sensitivity
1.23 V (+4.0 dBU) at 8 Ω

Voltage Gain
50x (34 dB)

Circuit Type
2-tier Class H

Power Consumption 6.3 A

1/8 power pink noise at 4Ω 15.6 A
Damping Factor > 300 at 8Ω

Input Impedance
10 kΩ balanced
20 kΩ unbalanced

Frequency Response
20 to 20,000 Hz +0/-1 dB -3 dB points
5 Hz to 50,000 Hz (LF filter bypassed/8 Ω)

Input Connections
Active balanced 3-pin Euro-style detachable terminal block
2 x 3-pin XLR
2 x 1/4" TRS

Continuously variable speed fan, back-to-front airflow

Output Connectors
Touch-proof binding posts
2 x Neutrik Speakon
Controls Front Panel AC switch
Channel 1 gain knob
Channel 2 gain knob
Controls Rear Panel 10-position DIP switch

Power-on: green LED
Signal: yellow LED (1 per channel)
Clip: red LED (1 per channel)
Protect: red LED (1 per channel)

Power Requirements
100, 120, 230 VAC at 50 to 60 Hz (factory configured)

Amplifier: Full short circuit, open circuit, thermal, ultrasonic, RF protection. Stable into reactive or mismatched loads
Load: Turn-on/off muting/AC coupling (850, 1450)/ Triac Crowbar (1050HD, 2450, 4050HD, 5050) on each channel

Rack Spaces

Plug Type
100/120V: NEMA 5-15
230V: CEE7/7

Dimensions (H x W x D) 3.5 x 19.0 x 15.9" (89.0 x 482 x 404 mm)
Weight 44.5 lb (20.2 kg)
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