Skip Navigation

Rockford Fosgate P3SD4-8

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

6 Reviews | 2 questions - 3 answers

Item # 575P3SD48

In Stock

Live nearby? We can ship this product to your nearest Crutchfield store for you to pick up.

When you check out, choose the store closest to you in the “Ship To” address section. You’ll get an estimated pickup date and the store will contact you when your item is ready.

825 Gardens Blvd

109 South Carlton

 Ships FREE

Was: $189.99

Special Purchase: -$70.00

Add to Cart

Ask an expert

Our VA-based experts can help.


Chat Email


Our take on the Rockford Fosgate P3SD4-8

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
  • warranty: 1 year
  • Our 60-day money-back guarantee

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)

I have limited room in a dodge truck to put subs ..I built a custom sealed box and ran it 2ohm. Amazing sound from a single sub ..powered by a fosgate 360 amp bridged to 2 ohms

Anonymous, Denver, CO


Rockford Fosgate P3SD4-8 Reviews

Average Customer Review(s):

(6 Reviews)

Rockford Fosgate P3SD4-8

Anonymous from Gardendale, AL on 9/5/2017

2008 Toyota Tundra
Crutchfield Customer Review (What's this?)

Thought ther would be some punch,sadly there wasn't.had good enough sound just no depth to it



Rockford Fosgate P3SD4-8

Anonymous from Denver, CO on 7/10/2017

1998 Dodge Ram
Crutchfield Customer Review (What's this?)

I have limited room in a dodge truck to put subs ..I built a custom sealed box and ran it 2ohm. Amazing sound from a single sub ..powered by a fosgate 360 amp bridged to 2 ohms



Serious for an 8 Inch sub!

Robert from Lancaster, OH on 5/22/2017

Crutchfield Customer Review (What's this?)

Due to some modifications that I didn't expect, I haven't had a chance to install this sub yet. However, right out of the box this speaker seems like it's one serious machine! Heavy and seemingly well made. I plan to update this review after install so can offer 5 stars.


Cons: none yet, haven't installed


Berdie from Atlanta, GA on 1/20/2014

Crutchfield Customer Review (What's this?)

Awesome fit in a very tight space!

Pros: Deep punch without distortion


Perfect for the price

PillzNY from Yonkers, NY on 7/14/2013

Crutchfield Customer Review (What's this?)

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

Anonymous from Saipan, MP on 9/23/2012

Crutchfield Customer Review (What's this?)

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




Hands-on research

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

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

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

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
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 ]