QSC RMX4050A

2 channels, 850 watts/ch at 8Ω, 1400 watts/ch at 4Ω, 2000 watts/ch at 2Ω, 4000 watts/ch at 4Ω (bridged).

SKU: QSC-RMX4050A

MSRP: $2,148.79

MAP: $1,799.99

Description

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 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-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

Model	RMX 850a	RMX 1450a	RMX 2450a	RMX 4050a	RMX 5050a
Power per Channel, Stereo Mode (both channels driven)
8Ω, FTC 20 Hz–20 kHz, 0.1% tdD	185 W	260 W	450 W	800 (650**) W	1050 W
8Ω, EIA 1 kHz, 0.1% tdD	200 W	300 W	500 W	850 W	1100 W
4Ω, FTC 20 Hz–20 kHz, 0.1% tdD	280 W	400 W	650 W	1300 W	1600 W
4Ω, EIA 1 kHz, 0.1% tdD	300 W	500 W (0.5% tdD)	800 W	1400 W	1800 W
2Ω, FTC 20 Hz–20 kHz, 1% tdD	–	–	–	1600 W	2000 W
2Ω, EIA 1 kHz, 1% tdD	430 W	700 W	1200 W	2000 W	2500 W
Power, Bridge-Mono Mode
8Ω, FTC 20 Hz–20 kHz, 0.1% tdD	530 W	800 W	1300 W	2600 W	3200 W
8Ω, EIA 1 kHz, 0.1% tdD	600 W	900 W	1500 W	2800 W	3600 W
4Ω, EIA 1 kHz, 1% tdD	830 W	1400 W	2400 W	4000 W	5000 W
Signal to Noise (20 Hz–20 kHz)	-100 dB
Distortion (SMPTE-IM)	< 0.01%	< 0.02%
Input Sensitivity at 8Ω	1.15V (+3.4dBu)	1.23V (+4.0 dBu)	1.42V (+5.3 dBu)
Voltage Gain	31.6x (30 dB)	40x (32 dB)	50x (34 dB)	64x (36 dB)
Output Circuitry	Class AB	2-tier Class H	3-tier Class H
Current Draw (120 V AC) Typical, 1/8 power pink noise at 4Ω* Severe, 1/3 power pink noise at 4Ω*	4.5 A 6.6 A	6.0 A 9.6 A	6.3 A 15.6 A	10.0 A 20.1 A	13.9 A 26.9 A
AC Mains Plug 100/120V 230V	NEMA 5-15 CEE7/7	NEMA 5-20 CEE7/7
Weight Net Shipping	35 lb (15.9 kg) 41 lb (18.6 kg)	40 lb (18.2 kg) 46 lb (20.9 kg)	44.5 lb (20.2 kg) 50.5 lb (23 kg)	68 lb (30.8 kg) 77 lb (34.9 kg)	75 lb (33.1 kg) 87 lb (37.2 kg)
Distortion (typical) 20 Hz–20 kHz, 10 dB below rated power 1 kHz and below, full rated power	< 0.03% tdD, 4Ω and 8Ω < 0.03% tdD, 4Ω and 8Ω	< 0.02% tdD, 4Ω and 8Ω < 0.02% 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	> 250 at 8Ω
Input Impedance	10 kΩ unbalanced; 20 kΩ balanced
Input Stage Clipping	10 V rms (+22 dBu)	6.4 V rms (+18 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
Dimensions	3.5-inch (8.9 cm) tall; 2 rack spaces	5.25-inch (13.3 cm) tall; 3 rack spaces
Power Requirements	100, 120, 230 V AC (factory configured), 50–60 Hz