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Flynn Audio logo with equalizer design.
Car audio amplifier with multiple input and output ports.

Rockford Fosgate R2-750X5

$540.00

Prime Series 5-channel car amplifier — 50 watts RMS x 4 at 4 ohms + 350 watts RMS x 1 at 2 ohms

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Give your system the power it deserves. Rockford Fosgate’s Prime Series R2-750X5 5-channel amplifier delivers a complete audio solution in one compact unit. It can power your front and rear speakers with 50 watts RMS each, while simultaneously driving a subwoofer with up to 350 watts RMS of clean, powerful bass.

This versatile Class-D amplifier offers multiple configuration options to match your specific audio needs. Use it in 5-channel mode for a full system, or bridge the amp to 3-channel mode to drive high-performance component speakers with 200 watts RMS each while still powering your subwoofer. The comprehensive filtering and adjustment options help you get maximum performance from all your speakers.

Product Highlights

  • Type: 5-channel car amplifier (Prime Series)
  • Power Output:
    • 50 watts RMS × 4 + 200 watts RMS × 1 at 4 ohms
    • 100 watts RMS × 4 + 350 watts RMS × 1 at 2 ohms
    • 200 watts RMS × 2 bridged at 4 ohms + 350 watts RMS × 1 at 2 ohms
  • CTA-2006 compliant: Standardized testing methodology

Key Features

  • Class-D Efficiency: Powerful yet energy-efficient design
  • Customizable Audio Control:
    • Front & Rear Channels: Variable high-pass and low-pass filters (50-250 Hz, 12 dB/octave)
    • Subwoofer Channel:
      • Variable low-pass filter (50-250 Hz, 12 dB/octave)
      • Variable Punch bass boost (0-12 dB at 45 Hz)
      • Variable subsonic filter (15-40 Hz, 12 dB/octave)
  • Easy Setup: C.L.E.A.N. gain system with clip lights ensures optimal sound quality
  • Convenience Features:
    • Included wired remote Punch Level Control for subwoofer
    • Auto remote turn-on capability
    • Compatible with both aftermarket and factory stereos via preamp and speaker-level inputs

Package Contents

  • 5-Channel amplifier
  • Wired Remote Level Control module with 16′ cable
  • Speaker input harnesses and connection hardware
  • Installation documentation and certification

Performance Specifications

  • RMS Power Output:
    • Full Range Channels: 50 watts × 4 at 4 ohms
    • Subwoofer Channel: 200 watts × 1 at 4 ohms
  • Power at 2 Ohms:
    • Full Range Channels: 100 watts × 4
    • Subwoofer Channel: 350 watts × 1
  • Bridged Power: 200 watts × 2 at 4 ohms (full range channels)
  • Minimum Impedance:
    • Bridged: 4 ohms
    • Unbridged: 2 ohms
  • Frequency Response: 20-20,000 Hz
  • THD at Rated RMS Power: 1%
  • Signal-to-Noise Ratio:
    • Full Range Channels: 80 dB
    • Subwoofer Channel: 75 dB
  • Input Voltage: 14.4V
  • Fuse Rating: 120 amp (external)
  • Replaces Previous Model: Rockford Fosgate R600X5

Physical Specifications

  • Dimensions:
    • Width: 11-1/4 inches
    • Height: 2 inches (1-15/16 inches in spec sheet)
    • Depth: 7-3/4 inches (6-13/16 inches in spec sheet)
  • Mounting Options:
    • Vertical, horizontal, or inverted
    • Horizontal mounting recommended for best cooling

Amplifier Features

  • Amplifier Class: D
  • Built-in DSP: No
  • Fan Cooled: No
  • Remote Control: Yes (included for subwoofer channel)

Audio Controls

  • Input Switch: 2-channel, 4-channel, or 5-channel selection
    • In 2-channel mode, front input signal feeds all channels
  • Independent Front/Rear Controls:
    • Gain: Rotary controls (labeled 0-11)
      • Input sensitivity: 150mV-4V line level or 450mV-12V speaker level
    • Crossover: 3-position switch (low-pass, all-pass, high-pass)
      • Low-pass range: 50-250 Hz (12 dB/octave Butterworth)
      • High-pass range: 50-250 Hz (12 dB/octave Butterworth)
    • Frequency: Rotary dials (50-250 Hz, continuously variable)
  • Subwoofer Channel Controls:
    • Gain: Rotary control (labeled 0-11)
    • Low-Pass Filter:
      • Always engaged (cannot be bypassed)
      • Frequency range: 50-250 Hz (12 dB/octave Butterworth)
    • Infrasonic Filter:
      • Variable: 15-40 Hz
      • Slope: 12 dB/octave
    • Bass Boost (Punch EQ):
      • Range: 0 to +18 dB
      • Frequency: 45 Hz

Remote Level Control

  • Function: Controls subwoofer channel output level from dash or center console
  • Dimensions:
    • Width: 1.16″ (2″ including mounting flanges)
    • Height: 0.92″
    • Depth: 1.55″ (2.375″ including knob and wiring)
  • Cable Length: 16 feet (RJ-25 connector on both ends)

Connectivity

  • Power/Ground Terminals: Nickel-plated set-screw terminals (accommodate up to 4-gauge wire)
  • Remote Turn-On Terminal: Nickel-plated set-screw terminal (accommodates up to 8-gauge wire)
  • Speaker Terminals: Nickel-plated set-screw terminals (accommodate up to 8-gauge wire)
  • Input Options:
    • RCA inputs (three pairs: front, rear, and subwoofer)
    • Speaker-level inputs with included harnesses
  • Auto Turn-on Switch: For DC offset detection with speaker-level inputs

Installation Requirements

  • External Fuse Required: 120-amp fuse placed within 18″ of battery
  • No onboard fuses
  • Recommended Wiring: 4-gauge power and ground wires

Package Contents (Detailed)

  • 5-Channel amplifier
  • Wired Remote Level Control module
  • 16′ Remote cable (RJ-25 connector on both ends)
  • Three 7″ Speaker input harnesses
  • 3mm Allen Hex key
  • Hardware:
    • Four 3/4″ screws
    • Two 1/2″ screws
    • 5 flat washers
    • 1 nut
  • Documentation:
    • Installation and Operation instructions (English/French/Spanish/German/Italian)
    • Certificate of Performance
    • Rockford Fosgate contact information

Configuration Options

  • 5-Channel Mode: Power four speakers plus a subwoofer
  • 4-Channel Mode: Power bridged front speakers, standard rear speakers, and a subwoofer
  • 3-Channel Mode: Power two pairs of bridged speakers and a subwoofer

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