Front view of the Rockford Fosgate PM400X4 amplifier showcasing its sleek design.
Close-up of the top-mounted control panel for easy tuning and adjustments.
Detailed shot of the Punch EQ and crossover controls on the amplifier.
Installation example of the PM400X4 in a marine audio system.
Detailed shot of the Punch EQ and crossover controls on the amplifier.
Side profile emphasizing the compact, marine-grade aluminum heatsink.
Highlight of the conformal-coated PC board for water and corrosion resistance.
Side-view of  Rockford Fosgate PM400X4 amplifier

Rockford Fosgate PM400X4 400 Watt 4-Channel Marine Amplifier

$469.99 $499.00
Front view of the Rockford Fosgate PM400X4 amplifier showcasing its sleek design.

Rockford Fosgate PM400X4 400 Watt 4-Channel Marine Amplifier

$469.99 $499.00
Product description

Power your marine or motorsport audio system with the Rockford Fosgate PM400X4, a 400 Watt 4-Channel Marine Amplifier designed to deliver dynamic, high-quality sound in the harshest environments. Engineered with Class A/B technology and featuring a conformal-coated PC board, this amplifier is the ultimate choice for boats, ATVs, and other motorsport applications.

Whether you’re looking to drive a 4-way front-stage/rear-fill setup or combine component speakers with subwoofers, the PM400X4 offers the versatility and performance needed to meet your audio demands. Its C.L.E.A.N. Set-up technology simplifies installation, while Punch EQ provides up to an 18dB bass boost for deeper, richer sound. With a marine-grade aluminum heatsink and epoxy-coated circuit boards, this amplifier is built to withstand water, salt, and UV exposure for years of reliable performance.


Key Features:

  • Element Ready™ Design: Built to withstand water, salt, and UV exposure for marine and motorsport use.
  • Versatile Power:
    • 50W x 4 @ 4Ω
    • 100W x 4 @ 2Ω
    • 200W x 2 @ 4Ω bridged
  • C.L.E.A.N. Set-Up: Simplifies gain setting for optimized audio performance.
  • Punch EQ: Boosts bass frequencies by up to 18dB for a powerful low-end sound.
  • Dynamic Power Output: Maintains exceptional sound clarity even at high volumes.
  • Conformal Coated PC Board: Protects against moisture, salt, and corrosion.
  • Compact & Durable: Cast aluminum heatsink and marine-grade hardware for rugged reliability.

Specifications:

  • Circuit Topology: Class A/B
  • Frequency Response: 20Hz – 20kHz +/- 1.0dB
  • Input Sensitivity: 150mV – 12V
  • Crossover Controls:
    • High-Pass/Low-Pass (50Hz–250Hz) @ 12dB/Octave Butterworth
  • Recommended Fuse: 60A
  • Power Wire Gauge: 8 AWG – 4 AWG
  • Dimensions: 2.38" H x 7.76" W x 11.03" D
  • Shipping Weight: 10.8 lbs

Applications:
The Rockford Fosgate PM400X4 is ideal for marine and motorsport audio systems, including boats, ATVs, and UTVs. Its robust construction and high-performance output ensure consistent sound quality in any environment.

Shipping & Return

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We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.