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Compact black rectangular mono subwoofer amplifier with finned heatsink and terminal blocks

Rockford Fosgate

Rockford Fosgate PM500X1BD 500W Marine Mono Subwoofer Car Amplifier

SKU CH-GZES-639DJ

Marine mono subwoofer amplifier delivering 500 W RMS at 1 ohm with variable low-pass, subsonic and PEQ2 bass controls plus C.L.E.A.N. gain setup

  • Amplifier classClass BD
  • Frequency range20 Hz to 250 Hz 250 Hz
  • RMS power rating1 × 150 W 150 W
  • Product typeAmplifiers
  • Marine-rated mono amp powers subwoofers on boats and powersports vehicles
  • Class BD design delivers 500 W RMS at 1 ohm for strong bass output
  • C.L.E.A.N. gain setup with included test tone CD simplifies accurate level matching
  • Variable low-pass filter 50-250 Hz plus selectable 28 Hz subsonic filter tailors frequency response
  • Speaker-level inputs with signal-sensing turn-on remove the need for a remote lead

Marine Mono Subwoofer Amplifier

The Rockford Fosgate PM500X1BD is a Class BD mono subwoofer amplifier built for marine and powersports installations. It delivers 150 watts RMS at 4 ohms, 300 watts RMS at 2 ohms and 500 watts RMS at 1 ohm. The frequency response spans 20 Hz to 250 Hz.

Buyers Needing Single Subwoofer Power

This unit suits owners adding one subwoofer to a boat, motorcycle or side-by-side who want high output from a compact mono design. It is not for systems requiring multiple amplifier channels or bridgeable configuration for stereo operation. Builders needing a dedicated midrange or tweeter amplifier should look elsewhere.

RMS Output and Filter Headroom

The amplifier comfortably handles a single subwoofer load down to 1 ohm with 500 watts RMS available. A variable low-pass filter adjustable from 50 to 250 Hz and a selectable 28 Hz subsonic filter shape the signal. Variable PEQ2 bass boost adds up to 18 dB at 45 Hz. The C.L.E.A.N. gain setup system with included test tone CD helps set levels accurately. Dynamic Thermal Management and MEHSA MOSFET cooling protect the output stage during extended play.

How it compares

Measured against everything we stock in Car Audio Amplifiers, at today’s prices. Recalculated every night.

Price $414.99
Pricier than about 74% of the 158 comparable items (median $225.49).

Specifications

Product
Brand nameRockford Fosgate
Product linePunch
Product typeAmplifiers
Audio & video
Frequency range20 Hz to 250 Hz 250 Hz
RMS power rating1 × 150 W 150 W
More details
Amplifier classClass BD
BridgeableNo

Questions about this item

What RMS power does the amplifier deliver into a 4-ohm subwoofer load?

The amp produces 150 W RMS into 4 ohms, 300 W RMS into 2 ohms and 500 W RMS into 1 ohm.

Can I keep my factory head unit and still use this amp?

Yes — speaker-level inputs with signal-sensing turn-on let you tap factory speaker wires without a separate remote lead.

How do I confirm the gain is set correctly after installation?

Use the included test-tone CD with the C.L.E.A.N. setup system to match input and output levels precisely.

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