Be the first to review this product
Questions? Call 1-800-355-7746 or Chat below
Free Shipping on most orders with minimum purchase of $50 or more for a limited time.
Ground shipments only in the lower 48 contiguous United States.
Excludes oversized or overweight items such as oversized speakers, oversized cases, trussing and staging. Other exclusions include some fluids, some parts and special orders.
Any questions, please call 1-800-355-7746 during normal business hours.
Offer subject to change or termination without notice. Not responsible for typographical errors.
The lowest price is not always the best price. When you shop with us, you can always expect to get our BestPrice+Plus guaranteed.
I DJ NOW - Babylon, NY store (Pick Up In Store Only)
Mon - Sat 10am - 8pm
Sun 11am - 5:00pm
631 321 1700
I DJ NOW - Queens, NY Store (Pick Up In Store Only)
Mon - Fri 10am - 9pm
Sat 10am - 7pm
Sun 12 noon - 6pm
718 762 0100
RMXa amplifiers include a comprehensive set of features including XLR and 1/4" balanced inputs, Speakon and binding post outposts for convenient connectivity. User-defeatable clip limiters and selectable low-frequency filters optimize sonic performance. The RMX 4050a is a "heavy duty" model designed to work as hard into 2 ohm loads as most competing amplifiers will at 4 ohms. Both the RMX 5050a and RMX 4050a feature a three-tier, Class H design that is extremely efficient at real world power levels. Less AC current is wasted and more available current goes into producing useful audio power. 120 volt versions of the RMX4050a accomplish all this with a standard 15 amp plug.
QSC RMX 4050a Power Amplifier 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" (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.
QSC RMX 4050a Specifications
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 AAC Mains Plug
100/120V
230VNEMA 5-15
CEE7/7
NEMA 5-20
CEE7/7Weight
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 8ΩFrequency 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 switchLED 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” (8.9 cm) tall; 2 rack spaces 5.25” (13.3 cm) tall; 3 rack spaces Power Requirements 100, 120, 230 V AC (factory configured), 50–60 Hz
(1) QSC RMX 4050a Power Amplifier
(1) Quick Start Guide
(1) Adhesive Rubber Feet Kit (For non rack-mount applications)
(1) Rear Rack Ear Mounting Kit
(1) IEC Detachable Power Cord
Login
Register
Forgot Your Password