MRX-M55

MRX-M55

Description

The all-new digital X-Power series of Class-D amplifiers incorporate even further advancement of Alpine’s digital technologies used in our top-of-the-line PDX series for greater power and improved sound quality.

Whilst ultra-compact, these digital powerhouses are engineered for robust no-shutdown performance and class-leading sound quality at an exceptional price. What’s more, their remote sense turn-on and speaker level input provides easy upgrading of factory systems.

X-Power amplifiers draw on Alpine’s revolutionary PDX digital design that achieves high efficiency with audiophile level audio performance and rivalling signal-to-noise ratio. Plus, their extremely high dampening factor ensures uncompromised power and control of low frequency transients.

Add the RUX-KNOB (sold separately) and get full control from the dash for instant bass adjustment. You also get the ability to control multiple amps from just one controller with simple telephone cord adapters.

Features

Amplifier Type: Class-D (Digital)

  • Channel Design: 1 Channel (Mono)
  • Power Supply Design: DC-DC PWM Power Supply
  • Power Supply: MOSFET
  • Final Outputs: Direct FET
  • Crossover: Variable Lowpass Filter
  • Gain Control: Continuously Adjustable Gain Control
  • Subsonic Filter: Variable Subsonic Filter
  • Bass EQ: Bass EQ Function
  • Bass Control: Remote Bass Control (RUX-KNOB) Ready
  • Low-impedance Possibility
  • Current Protection: Over-Current, Over-Voltage and Thermal Protection
  • Board Circuitry: S.T.A.R. Circuit
  • Board Design: 6-layer Glass Epoxy PC Board
  • RCA Output: Non-Fading Pre-Amp Output
  • Speaker-Level Inputs: 4-channel Speaker Level Inputs
  • Power Indicator: Top Mounted Blue LED Power Indicator
  • Thermal Control: Multi-stage Power Limits

Specifications

Max Power: 1100W RMS Power Ratings

  • Per channel into 4 Ohms: 350W RMS x 1 (14.4V at <1% THD+N)
  • Per channel into 2 Ohms: 550W RMS x 1 (14.4V at <1% THD+N)
  • Per channel into 1 Ohm: 400W RMS x 1 (14.4V at <1% THD+N)

Sound Tuning

  • Crossover Frequency (LPF): 50 – 400 Hz, -24dB/oct.
  • Subsonic Filter: 5 – 30 Hz, -24dB/oct.
  • EQ (Equalizer): 0 to +12dB, fc=50Hz

Dimensions

  • Foot Print (WxHxD) mm: 250 x 58 x 230 mm
  • Foot Print (WxHxD) in: 9-7/8” x 2-1/4” x 9”
  • Heat Sink (WxHxD) mm: 190 x 58 x 230 mm
  • Heat Sink (WxHxD) in: 7-1/2” x 2-1/4” x 9”

General

  • Power Requirements: 14.4 V.DC (11-16V allowable)
  • Input Sensitivity (RCA Input): 0.1 – 4.0 V
  • Input Sensitivity (Speaker Level Input): 0.5 – 10 V
  • Input Impedance: >10k ohms
  • Frequency Response (+0, -3dB: 1W into 4 Ohms) for Subwoofer: 5 -400 Hz
  • Frequency Response (+0, -1dB: 1W into 4 Ohms) for Subwoofer: 10 -300 Hz
  • THD+N (10W into 4 Ohms) for Subwoofer: <0.004 %
  • THD+N (300W into 4 Ohms) for Subwoofer: <0.04 %
  • Damping Factor for Subwoofer: >1000
  • Signal to Noise (Rated Power into 4 Ohms) for Subwoofer: 114 dB
  • Preamp Output: 4.0V Max.
  • Remote Level: -20 to 0 dB
  • Weight: 2.6 kg


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