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

RMX4050a

$1,799.99 Regular Price
$1,499.99Sale Price
  •  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
    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
    Product Dimensions (H×W×D) 89 (2 RU) × 482 × 404 mm
    3.5 (2 RU) × 19 × 15.9 in
    132 (3 RU) × 482 × 404 mm
    5.25 (3 RU) × 19 × 15.9 in
    Carton Dimensions (H×W×D) 610 × 560 × 153 mm
    24 × 22 × 6 in
    610 × 560 × 229 mm
    24 × 22 × 9 in
    Net Weight 15.9 kg / 35 lb 18.2 kg / 40 lb 20.2 kg / 44.5 lb 30.8 kg / 68 lb 33.1 kg / 75 lb
    Shipping Weight 18.6 kg / 41 lb 20.9 kg / 46 lb 23 kg / 50.5 lb 34.9 kg / 77 lb 37.6 kg / 87 lb
    Power Requirements 100, 120, 230 V AC (factory configured), 50–60 Hz
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