Rockford Fosgate Prime 750 Watt Class-D Mono Amplifier - R750-1D


The PRIME R750-1D is an ultra-efficient mono amplifier that can produce 750 Watts into a 1-Ohm load without taxing the electrical system. The frequency response of the R750-1D is optimized exclusively for use with subwoofers.

The Prime R750-1D amplifier offers high efficiency through the implementation of its Class-D circuitry while delivering rich, full bass to any system. This amplifier is optimized for subwoofers with the implementation of an infrasonic filter to keep those ultra-low (inaudible) bass notes from damaging your subwoofer system. Match with a 4-channel stereo amplifier for your mids/highs and you'll have a Rockford Fosgate system that any Car Audio Fanatic will envy.

  • 12dB/octave Butterworth crossover
  • Infrasonic filter
  • On-board Punch EQ with +18dB boost @ 45Hz
  • Remote PLC (Punch Level Control)
  • RCA pass-thru outputs
  • Real time output and power supply thermal sensing
  • Cast aluminum heatsink
  • Top mounted controls
  • 4 Gauge power/ground connectors
  • MOSFET power supply
  • Short circuit protection
  • Muted turn on
  • 1 Year Warranty



High efficiency amplifier design that reduces current consumption from the charging system.

CTA-2006 Compliant

Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings.

CE Compliant

This product fulfills all essential safety and environmental requirements as defined in the European Directives (768/2008 EC).

CEA-2006 CompliantCEA-2006 Power Rating, 250W x 1 @ 4Ω, ≤1.0% THD+N
Cta-2006 Compliant-
Number of Channels4
Total Power (Sum of Rated Power)750 Watts RMS
Rated Power (RMS Continuous Power)250 Watts x 1 @ 4-Ohm, 500 Watts x 1 @ 2-Ohm, 750 Watts x 1 @ 1-Ohm
Dynamic Power (PVC/PowerCube®)310 Watts x 1 @ 4-Ohms 0° Res, 567 Watts x 1 @ 2-Ohms 0° Res, 966 Watts x 1 @ 1-Ohm 0° Res
Frequency Response20Hz to 250Hz +/-1dB
Input Sensitivity150 mV to 4 V
Circuit Topology ClassClass D
Efficiency (average)85% @ 4-Ohm, 85% @ 2-Ohm, 80% @ 1-Ohm
Total Harmonic Distortion (THD+Noise)4-Ohm: <1.0%, 2-Ohm: <1.0%, 1-Ohm: <1.0%
Signal InputLow Level: 1 RCA Pair
Signal OutputLow Level: 1 RCA Pair
Tone Controls0dB to +18dB @ 45Hz
Crossover ControlsLow-Pass: Variable 50Hz - 500Hz @ 12dB/Octave, Infrasonic
Remote ControlsPunch Level Control (when connected, is linked to "gain control" to provide remote output level)
Visual IndicatorsPower Protect
Power Wire Gauge4 AWG
Power Input ConnectorBlock
Speaker Wire Gauge12 AWG
Speaker Output ConnectorBlock
Operating Voltage9 - 16 VDC
Recommended Fuse (not included)100 A
Average Current Draw (13.8V Music)40 A
Max. Current Draw (13.8V Sinewave)80 A
Suggested Alternator75 A
Dimensions(H x W x D)1.97" x 6.77" x 9.10" (5cm x 17.20cm x 23.10cm)
Shipping Weight6.6 Lbs. (2.99 Kg.)

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