Description

QSC RMX2450A 2 Channel Power Amplifier 800 Watts Rackmount

The 750 watts per channel at 4Ω QSC RMX2450a Low-Z Power Amplifier is a 2RU rack mountable amplifier designed for live sound reinforcement applications. The amplifier features two 2-tier Class H output channels that can operate in either stereo or mono bridge mode. The unit operates on a standard 15 amp plug and utilizes high-current toroidal transformers for less noise and better performance when pushing a 2 ohm load. To reduce distortion, the amplifier utilizes independent user-defeatable clip limiters and includes LED indicator lights to show the presence of the signal and when the signal is clipping.

The chassis of the amplifier is designed with front to rear cooling vents and includes selectable low-frequency filters at 30 Hz and 50 Hz to protect speakers from bottoming out and improve headroom when driving mid and high frequencies. The front panel of the unit features two gain control knobs for easy access and each channel is protected by a dedicated DC and thermal overload protection circuit. For inputs, the back of the unit accepts both balanced 1/4" and XLR inputs. For outputs, the unit features both Neutrik Speakon and touch-proof binding post connections.

Features:
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 RMX2450a'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-inch (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

Specifications:
8Ω, FTC 20 Hz–20 kHz, 0.1% THD: 450 W
8Ω, EIA 1 kHz, 0.1% THD: 450 W
4Ω, FTC 20 Hz–20 kHz, 0.1% THD: 650 W
4Ω, EIA 1 kHz, 0.1% THD: 800 W
2Ω, FTC 20 Hz–20 kHz, 1% THD: 1200 W
Power, Bridge-Mono Mode:
8Ω, FTC 20 Hz–20 kHz, 0.1% THD: 1300 W
8Ω, EIA 1 kHz, 0.1% THD: 1500 W
4Ω, EIA 1 kHz, 1% THD: 2400 W
100 V Direct Drive, EIA 1 kHz, 1% THD: 1500W
Signal to Noise (20 Hz–20 kHz): 2400W
Distortion (SMPTE-IM): < 0.02%
Input Sensitivity at 8Ω: 1.23V (+4.0 dBu)
Voltage Gain: 50x (34 dB)
Output Circuitry: 2-tier Class H
Current Draw (120 V AC):
Typical, 1/8 power pink noise at 4Ω*: 6.3 A
Severe, 1/3 power pink noise at 4Ω*: 15.6 A
AC Mains Plug: NEMA 5-15
100/120V: CEE7/7
Distortion (typical):
20 Hz–20 kHz, 10 dB below rated power: < 0.03% tdD, 4Ω and 8Ω
1 kHz and below, full rated power: < 0.03% tdD, 4Ω and 8Ω
Frequency Response: 20 Hz–20 kHz: +0/-1 dB -3 dB points: 5 Hz and 50 kHz (LF filter bybassed, 8Ω)
Damping Factor (1 kHz and below): > 300 at 8Ω
Input Impedance: 10 kΩ unbalanced; 20 kΩ balanced
Input Stage Clipping: 10 V rms (+22 dBu)
Cooling: Continuously variable speed fan, back-to-front air flow
Connectors (each channel): Input: Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+) Output: Touch-proof binding posts; Neutrik Speakon®
Controls:
Front: AC switch; Channel 1 & 2 gain knobs
Rear: 10-position DIP switch
LED Indicators: Power on: Green; Signal: Yellow (1 per channel); Clip/Protect: Red (1 per channel)
Amplifier Protection: Full short circuit, open circuit, tdermal, ultrasonic, RF protection. Stable into reactive or mismatched loads
Load Protection: Turn-on/off muting; AC coupling (850, 1450); Triac crowbar (1850HD, 2450, 4050HD, 5050) on each channel
Product Dimensions (H×W×D):
89 (2 RU) × 482 × 404 mm
3.5 (2 RU) × 19 × 15.9 in
Carton Dimensions (H×W×D):
610 × 560 × 153 mm
24 × 22 × 6 in
Net Weight:
Shipping Weight:
Power Requirements: 100, 120, 230 V AC (factory configured), 50–60 Hz