Rockford Fosgate P3SD4-8

Punch Stage 3 shallow 8" subwoofer with dual 4-ohm voice coils

Item #: 575P3SD48

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Rockford's bass pedigree

Rockford Fosgate's Punch Stage 3 subwoofers come from a long line of high-performance subs that deliver real deal bass. Now, shallow-mount Punch Stage 3 subwoofers make it easier to get impressive low end in smaller or hard-to-fit vehicles.

Side view of P3SD4-8 shallow subwoofer

Advanced engineering

The P3SD4-8 8" shallow subwoofer hangs with its bigger brethren, thanks to advanced materials and engineering. Rockford uses anodized aluminum for the cone and dust cap making the woofer light and easier to drive, yet rigid enough to maintain its shape under maximum load. The M-Roll Santoprene™ surround also provides excellent excursion for maximum output while being durable enough to last.

Powerful bass for a tight space

A low-profile frame houses the subwoofer, with abundant venting to battle overheating and thermal breakdown. At 2-5/8 inches deep, this sub will fit into places where no bass has gone before — just build a custom enclosure or find a suitable box. The dual 4-ohm voice coils allow you to wire up multiple subs or to coax optimum performance from your amplifier.

To drive this single subwoofer, we recommend a mono amplifier rated between 120 and 225 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 8" shallow subwoofer with dual 4-ohm voice coils
  • anodized aluminum cone with M-Roll Santoprene™ surround
  • power range: 50-150 watts RMS (75 watts per voice coil)
  • peak power handling: 300 watts
  • frequency response: 38-250 Hz
  • sensitivity: 82 dB
  • top-mount depth: 2-5/8"
  • sealed box volume: .20-.70 cubic feet
  • ported box volume: .75 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Rockford Fosgate P3SD4-8 Reviews

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Written By Berdie, Atlanta, GA on Monday, January 20, 2014

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Awesome fit in a very tight space!

Pros: Deep punch without distortion

Perfect for the price

Written By PillzNY, Yonkers, NY on Sunday, July 14, 2013

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

For the price, it exceeds what I expected. Provides just the right amount of thump

Pros: Fit right into the truck's stock enclosure without having to make any mods

Cons: Couldn't use the grill it came with but it's not like you can see it anyway

Rockford Fosgate P3SD4-8

Written By Anonymous, Saipan, MP on Sunday, September 23, 2012

Crutchfield Customer Review (What's this?)

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Fair price, bundled product, easy installation, good sound output

Hands-on research

What's in the box?

Download owner's manual

  • One shallow-mount 8" Dual 4-ohm voice coil woofer
  • 1 Aluminum trim ring
  • Eight 1-1/4" Self-tapping Allen head screws
  • 4mm Allen bit
  • Installation and Operation manual (English/ French/ Spanish/ German)

Product Research

Enclosure Compatibility


Shallow Mount Design: The Rockford Fosgate Punch P3S shallow subwoofer is designed and engineered with a more shallow motor assembly, reducing the overall depth of the woofer and allowing it to fit in smaller locations in your vehicle.

Dual Voice Coils: This woofer features dual 4-ohm voice coils for wiring flexibility. When the voice coils are wired in parallel, the woofer presents a 2-ohm load. When the voice coils are wired in series, the woofer presents an 8-ohm load.

Compression Terminals: The P3SD4-8 features spring post terminals which accommodate pin connectors, single banana plugs, or bare speaker wire up to 10 gauge.

Note: The rubber magnet cover may need removed (or repositioned) to insert pin connectors or banana plugs.

CEA-2031 Compliant: Power handling conforms to CEA-2031 industry standards, meaning the subwoofer has the capacity to handle its rated power under continuous demand, not just for an instant.

VAST Surround: The Vertical Attach Surround Technique (VAST) increases a speaker's effective radiating cone area without increasing the size of the basket.

FlexFit Basket: The Flex Fit frame utilizes slots (where possible) instead of single screw sized holes; allowing slight adjustment of the speaker when mounted.

Trim Ring: For added cosmetic appeal the woofer comes with an aluminum trim ring that mounts over the flange of the woofer. When using the trim ring, the woofer is first mounted with four screws, then the ring is mounted over the woofer, aligning the final four holes of the woofer with the ring. The other four screws are used in these holes to mount the ring and woofer to the enclosure. The trim ring increases the mounting height of the woofer to approximately 1 inch, and the ring's diameter is approximately 9 inches.

Enclosure Compatibility

Sealed Box: Rockford recommends a sealed enclosure with an optimum internal volume of 0.25 cubic feet (from 0.2 to 0.70 cubic feet is acceptable). Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Ported Box: Rockford recommends a ported enclosure with an internal volume of 0.75 cubic feet using one 3" diameter x 9" long port; this yields a tuning frequency of 47.5 Hz. Ported (or vented) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power. However, this efficiency comes at the expense of very low frequency output (below 37 Hz).

Our Product Research Team

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