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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.

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

Item # 575P3SD48

Ships free

Temporarily out of stock

Ship date unknown

$169.99 each

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.


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)

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Crutchfield response

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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

4 questions already asked

I got a 2017 300s with the beats audio sub Would I need to change the amp if I switch to the Rockford Fosgate P3SD4-8 ?
[ Polos300  Mar 24, 2020 ]
5 answers
You will likely want to add a new amp to power that Rockford P3 adequately. The Rockford Punch 300X1 would be a good choice:
[ Cosmo  Apr 21, 2020 ]  Staff
I mean 150 watt not amp.
[ Forrest L Dilley  Apr 17, 2020 ]
I would change the amp to at least a 100 watt rms amp. I am running mine at 150 amp rms in a vented box and it kicks butt! (Also get the right adapter to run the amp.( I'm using the AP4-CH21 for my car (at Crutchfield)).
[ Forrest L Dilley  Apr 17, 2020 ]
Im not really sure because I don't know what's your complete sound system set up. I don't know what your trying to achieve with your sound system as far as sound quality or SPl!!! Your would have to go more in depth as to what your trying to do with a CRUTCHFIELD CARAUDIO expert!!!
[ JOSE A  Apr 17, 2020 ]
I have a 2019 Civic Sport Touring with a stock sub. It has I think a 75w stock amp. I was able to just splice the speaker wires going to the stock sub and wire it to this one. Best to check the forums to see what kind of stock harness goes to your stock sub. If its just +/- than it should work. FYI It sounded a little nicer but no where near its actual potential. Not sure how powerful your 300s's stock amp is.
[ Dhananjay  Apr 17, 2020 ]
What amp would you recommend for this sub?
[ Paul  Jul 21, 2019 ]
1 answer
Thanks for your question. For information on selecting the best amp for your subs I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Krissy  Jul 31, 2019 ]  Staff
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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