QSC RMX2450a 500Watts 8 Ohm Two Channels Power Amplifier
The RMXa Series amplifiers from QSC offer true professional-quality performance at an affordable price. Three 2-rackspace models range in power from 430 to 1200 watts per channel at 2 ohms. Two 3-rackspace models provide 2000 to 2500 watts per channel at 2 ohms. All five models feature a compact chassis less than 16 inch deep. RMXa amplifiers include a comprehensive set of features including XLR and 1/4 inch balanced inputs, Speakon and binding post outposts for convenient connectivity. User-defeatable clip limiters and selectable low-frequency filters optimize sonic performance.
Key Features
- Compact size
- 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
- 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
Technical Specifications
8 OHM, FTC 20 Hz–20 kHz, 0.1% THD
450 W
8 OHM, EIA 1 kHz, 0.1% THD
500 W
4 OHM, FTC 20 Hz–20 kHz, 0.1% THD
650 W
4 OHM, EIA 1 kHz, 0.1% THD
750 W
2 OHM, EIA 1 kHz, 1% THD
1200 W
8 OHM, FTC 20 Hz–20 kHz, 0.1% THD
1300 W
8 OHM, EIA 1 kHz, 0.1% THD
1500 W
4 OHM, EIA 1 kHz, 1% THD
2400 W
Signal to Noise (20 Hz–20 kHz)
-100 dB
Distortion (SMPTE-IM)
<0.02%
Input Sensitivity at 8 OHM
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 4 OHM: 6.3 A
Severe, 1/3 power pink noise at 4 OHM: 15.6 A
AC Mains Plug
NEMA 5-15
Weight
Net: 44.5 lb (20.2 kg)
Shipping: 50.5 lb (23 kg)
Distortion (typical)
20 Hz–20 kHz, 10 dB below rated power: < 0.03% THD, 4 OHM and 8 OHM
1 kHz and below, full rated power: < 0.03% THD, 4 OHM and 8 OHM
Frequency Response
20 Hz–20 kHz: +0/-1 dB -3 dB points: 5 Hz and 50 kHz (LF filter bybassed, 8 OHM)
Damping Factor (1 kHz and Below)
> 300 at 8 OHM
Input Impedance
10 k OHM unbalanced; 20 k OHM 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, thermal, 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
Dimensions
3.5 inch (8.9 cm) tall; 2 rack spaces
Power Requirements
100, 120, 230 V AC (factory configured), 50–60 Hz
