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Rockford Fosgate P3SD4-8

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

Item # 575P3SD48

Rockford Fosgate's Punch Stage 3 subwoofers come from a long line of high-performance subs that deliver real deal bass.

Read more from Crutchfield writer, John P.

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$149.99 each

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About the Rockford Fosgate P3SD4-8

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.

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
  • grille not included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # P3SD4-8

What's in the box:

  • 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)

Customer reviews

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Rockford Fosgate P3SD4-8 Reviews

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More details on the Rockford Fosgate P3SD4-8

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).

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Customer Q&A

Crutchfield asked: Why did you buy this?
To replace my factory sub. [ Matthew  Feb 13, 2019 ]
relied on gordo expertise [ william  Feb 08, 2019 ]
stock replacement [ Brian  Oct 16, 2018 ]
Need a shallow mount sub for a rear lift gate speaker for 2018 Toyota Highlander [ Dan  Sep 25, 2018 ]
Otis said i needed it [ ora  Aug 06, 2018 ]
Eddie suggested it for my application [ MARK  Mar 07, 2018 ]
The factory 8" subwoofer in my 2016 Honda Civic popped. I bought this car specifically because of the "premium" sound system. It is not premium so I will have to do some modifications, but this sub should allow me to utilize the factory allotted space to have a much better sounding system. This speaker will also run with the factory amp, so I won' have to install additional amps. [ Jason  Nov 10, 2017 ]
Otis' help. [ Thomas  Oct 31, 2017 ]
The price and reviews and also the quality. [ Elder  Jul 19, 2017 ]
Best priced choice with right specs to replace worn out factory sub. [ Justin  Jun 24, 2017 ]
Seemed to be a good fit for my application, Great deal and you can't go wrong with RF. [ Andrew  Jun 04, 2017 ]

2 questions already asked

Will this fit in the factory rear deck location of a 2008 Honda Civic Si Coupe and being powered by the factory Navigation Unit and Amplifier?
[ Wiyet  Jan 24, 2017 ]
1 answer
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.
[ Kenny  Jan 25, 2017 ]  Staff
There is 1.5" of space between the floor of my vehicle and the bottom of the box. Will this subwoofer work or will the cone hit the floor?
[ Travis  Feb 04, 2014 ]
2 answers
I would need more info. What box? What vehicle? Are you looking to mount this as a free air woofer firing down at the floor? If so, you would need to the woofer excursion spec. (the distance the woofer travels)
[ MITCHELL  Feb 13, 2014 ]
I'm really not understanding why the distance from the box to the bottom of your vehicle matters about this woofer working. My question to you is, are you concerned about the Woofer fitting in the Box or the Box fitting in you Vehicle?
[ RICKY  Feb 06, 2014 ]

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