Alpine MRX-F35 4 ch amplifier

X-Power 4 Channel 170 watt RMS (bridged, 2 ohms) Amplifier


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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.


Terminal Layout: Two-Sided
Screw Mount / Wire Cover: Integrated Wire and Mounting Screw Terminals

Amplifier Type: Class-D (Digital)
Channel Design: 4/3/2 Channel
Thermal Control: Thermal Management Control
Power Supply: MOSFET
Power Supply Design: DC-DC PWM Power Supply
Board Circuitry: S.T.A.R. Circuitry
Current Protection: Over-Current, Over-Voltage and Thermal Protection
Power Indicator: Top Mounted Blue LED Power Indicator
4-Channel Speaker-Level Inputs
Crossover: Variable Lowpass & Highpass Filter
Built-in Bass EQ
Final Outputs: Direct FET
Board Design: 6-layer Glass Epoxy PC Board
Gain Control: Continuously Adjustable Gain Control


Max Power Output Ratings
Total Max Power: 650W

RMS Power Ratings
Per Channel into 4ohms, 14.4V (≤1%THD+N): 55W
Per Channel into 2ohms, 14.4V (≤1%THD+N): 85W
Bridged into 4ohms, 14.4V (≤1%THD+N): 170W x 2

Sound Tuning
Crossover Frequency (LPF/HPF Selectable) : Variable, 50 – 400Hz (-12dB/oct.)
EQ (Equalizer): Bass EQ (fc=50Hz) 0 to +12dB for CH-3/4

Heat Sink: 190 x 58 x 230 mm
Footprint: 250 x 58 x 230 mm

Power Requirements: 14.4V DC (11 – 16V)
Input Sensitivity (RCA Input): 0.2 – 4.0V
Input Sensitivity (Speaker Level Input): 0.5 – 10V
Input Impedance: >10k ohms
Frequency Response (+0, -3dB: 1W into 4 ohms): 5Hz – 45kHz
Frequency Response (+0, -1dB: 1W into 4 ohms): 7Hz – 30kHz
THD+N (10W into 4 ohms): <0.02% THD+N (Rated Power into 4 ohms): <0.07% Damping Factor: >500
Signal to Noise (Rated Power into 4 ohms): 104dB
Weight: 2.4kg


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