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
Retail: $2,438.00
Price: $2,127.00
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    Item #: RMX5050a

    Description

    2 channels, 1100 watts/ch at 8Ω, 1800 watts/ch at 4Ω, 2500 watts/ch at 2Ω, 5000 watts/ch at 4Ω (bridged)

    Specifications

    Professional Power Amplifiers

    RMXa Series

    RMX 850a | RMX 1450a | RMX 2450a |

    RMX 4050a | RMX 5050a

    RMX 850a | RMX 1450a |

    RMX 2450a | RMX 4050a |

    RMX 5050a

    Features

    • Professional quality performance—

    incorporates road-proven QSC designs

    • The 4000 watt RMX 4050a operates on a

    standard 15 amp plug (120V)

    • Both the RMX 4050a and RMX 5050a

    feature a dual mono, high-current power

    supply for increased reliability and

    performance

    • The RMX 4050a provides improved thermal

    performance yielding higher continuous

    power in 2 ohm stereo or 4 ohm bridged

    applications.

    • Compact size — up to 2500 watts in 2 rack

    spaces or 5000 watts in 3 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

    • 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 to monitor

    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

    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” deep. 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.

    RMX 5050a

    QSC’s RMX 5050a power amplifier

    represents state-of-the-art in professional

    quality performance at an affordable

    price. Perfectly suited for a wide range of

    sound reinforcement applications including

    professional touring, performing musicians,

    and mobile entertainers, the RMX 5050a is

    optimized to deliver high levels of sustained

    power, extraordinary audio performance and

    road-proven reliability.

    RMX 4050a

    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.

    RMX Power Amplifiers

    Watts per channel

    Model 8Ω 4Ω 2Ω* Bridged 4Ω*

    RMX 850a 200 300 430 830

    RMX 1450a 300 500 700 1400

    RMX 2450a 500 800 1200 2400

    RMX 4050a 850 1400 2000 4000

    RMX 5050a 1100 2000* 2500 5000

    8 ohms: 0.1% THD, 4 ohms: 0.5% THD, 2 ohms and 4 ohms bridged: 1 kHz, 1% THD

    RMXa Details

    1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174

    RMXa Spec Sheet 08/09/2013

    please recycle

    © 2013 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark

    office and other countries. Speakon is a trademark of Neutrik. All other trademarks are the property of their respective owners. Patents may apply or be pending.

    Specifications subject to change without notice.

    RMX 850a RMX 1450a RMX 2450a RMX 4050a RMX 5050a

    Stereo Mode (both channels driven)

    8Ω / FTC 20 Hz – 20 kHz / 0.1% THD

    8Ω / EIA 1 kHz / 0.1% THD

    4Ω / FTC 20 Hz – 20 kHz / 0.1% THD

    4Ω / EIA 1 kHz / 0.1% THD

    2Ω / FTC 20 Hz – 20 kHz / 1% THD

    2Ω / EIA 1 kHz / 1% THD

    185 W

    200 W

    280 W

    300 W

    430 W

    260 W

    300 W

    400 W

    500 W (0.5% THD)

    700 W

    450 W

    500 W

    650 W

    750 W

    1200 W

    800 (650**) W

    850 W

    1300 W

    1400 W

    1600 W

    2000 W

    1050 W

    1100 W

    1600 W

    1800 W

    2000 W

    2500 W

    Bridge-Mono Mode

    8Ω / FTC 20 Hz – 20 kHz / 0.1% THD

    8Ω / EIA 1 kHz / 0.1% THD

    4Ω / EIA 1 kHz / 1% THD

    530 W

    600 W

    830 W

    800 W

    900

    1400 W

    1300 W

    1500 W

    2400 W

    2600 W

    2800 W

    4000 W

    3200 W

    3600 W

    5000 W

    Signal to Noise (20 Hz – 20 kHz) 8Ω > -100 dB > -100 dB > -100 dB > -100 dB > -100 dB

    Distortion (SMPTE-IM) < 0.01% < 0.01% < 0.02% < 0.02% < 0.02%

    Input Sensitivity at 8Ω 1.15V (+3.4 dBu) 1.15V (+3.4 dBu) 1.23V (+4.0 dBu) 1.42V (+5.3 dBu) 1.42V (+5.3 dBu)

    Voltage Gain 31.6x (30 dB) 40x (32 dB) 50x (34 dB) 64x (36 dB) 64x (36 dB)

    Output Circuitry Class AB Class AB 2-tier Class H 3-tier Class H 3-tier Class H

    Power Requirements

    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

    Supplied Plug Type, 100/120V NEMA 5-15 NEMA 5-15 NEMA 5-15 NEMA 5-15 NEMA 5-20

    Supplied Plug Type, 230V CEE7/7 CEE7/7 CEE7/7 CEE7/7 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

    1.0 kHz and below: full rated power

    < 0.03% THD / 4Ω and 8Ω

    < 0.03% THD / 4Ω and 8Ω

    < 0.02% THD / 4Ω and 8Ω

    < 0.02% THD / 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 10k ohms unbalanced / 20k ohms balanced

    Input Clipping 10 Vrms (+22 dBu) 6.4 Vrms (+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 / Ch. 1 & 2 gain knobs

    Rear: 10-position DIP switch

    Indicators Power-on: Green LED / Signal: Yellow LED (1 per channel) / Clip: Red LED (1 per channel) | Protect: Red LED

    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” (8.9 cm) tall / 2 rack spaces 5.25” (13.3 cm) tall / 3 rack spaces

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

    1

    1.0 kHz sine wave, 1% THD, 1 channel driven