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Rockford Fosgate P2D4-15

Punch P2 15" subwoofer with dual 4-ohm voice coils

6 Reviews

Item # 5751P2D415

In Stock

Was: $259.99

Special Purchase: -$90.00

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Our take on the Rockford Fosgate P2D4-15

Standout performance

Rockford Fosgate showcases their fanatical commitment to sonic excellence in the Punch Series of speakers, amps, and subs. If you like to listen to potent, powerful music — and feel it too — Punch components will give you impressive sound that'll stand out in a crowd.

Cutaway view

Bulletproof bass

Engineers at Rockford Fosgate designed the P2D4-15 15" subwoofer to dish out the kind of powerful low end you crave in your ride. Its responsive paper cone is reinforced with the same Kevlar® fibers used in bulletproof vests so you get the best of both worlds — warm bass that's exceptionally hard-hitting. Rockford Fosgate uses a new technique to attach the oversized rubber surround to the cone that increases available cone area up to 25%, so this sub can push more air for even bigger bass.

Made for heavy excursion

This P2 sub features an extended pole piece and bumped backplate that leaves more room for heavy excursion, so it'll hit deeper lows without "bottoming out." Special venting keeps the copper-clad aluminum voice coils cool through heavy use for consistent bass performance over time.

The dual 4-ohm voice coils allow you to wire the sub for 2-ohm impedance to work with a mono sub amp, or for 8-ohm impedance if you're using multiple subs. The P2D4-15 sub works equally well in a sealed or ported enclosure, so you can choose the kind of bass you want for your system.

To drive this single subwoofer, we recommend a mono amplifier rated between 300 and 600 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.

Product Highlights:

  • 15" subwoofer with dual 4-ohm voice coils
  • Kevlar® reinforced paper cone
  • Santoprene surround
  • hybrid StampCast basket provides strength while minimizing weight and resonance
  • power range: 150-400 watts RMS (800 watts peak power)
  • frequency response: 21-250 Hz
  • sensitivity: 86 dB
  • top-mount depth: 7-7/16"
  • sealed box volume: 1.3 to 3.5 cubic feet
  • ported box volume: 2.66 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

One of the hardest hitting subs I ever thought of buying I shake my whole house coming up my driveway and it's 800 feet long been told by family they can hear me before I get to my road

Anonymous, Houston, TX

What's in the Box:

  • One 15" Dual 4-ohm voice coil subwoofer
  • Trim ring
  • Eight 1-1/8" Allen head screws
  • 4mm Allen head bit
  • Installation/Operation manual (English/ French/ Spanish/ German)

Rockford Fosgate P2D4-15 Reviews

Average Customer Review(s):

(6 Reviews)

Rockford Fosgate P2D4-15

Anonymous from Houston, TX on 9/15/2017

Crutchfield Customer Review (What's this?)

One of the hardest hitting subs I ever thought of buying I shake my whole house coming up my driveway and it's 800 feet long been told by family they can hear me before I get to my road

Pros: Low hitting Super loud Great quality

Cons: None so far

Love it!!

Frankie from York pa on 6/26/2017

Crutchfield Customer Review (What's this?)

I had 2 12" kicker Compitions in prior to to this one Rockford. This one sub hits harder than them two subs!! The sound it delivers is amazing, I love this sub.

Pros: It delivers, point blank.

Cons: It did not come with a grill.

good sound, poor durability

Bryan from Madison, WI on 6/22/2017

2002 Saturn L300
Crutchfield Customer Review (What's this?)

Great sound, deep solid bass in my enclosed box. Not as loud as my last but much higher SPL. I really liked this Sub. It was my second one. I'll buy a third, but the reason is why I'm giving this 3 stars. The Sub had something burn out in it after 20 months. Four of which it wasn't even installed... The Sub only has a 1 year warranty so now I'm buying a new one.

Pros: sound quality, installation hardware, speaker wire contacts

Cons: durability

If your looking for a thump, this will more than do it.

Barry from Chico, CA on 6/19/2017

Crutchfield Customer Review (What's this?)

I used the sub for 2 weeks, I attempted to break it in before I pondered a review. It is in the sealed 15" sound ordnance enclosure also sold on Crutchfield with 1 2/3 pounds of poly fill. I really really like this sub woofer. It is a beast and it barely fits in the back of my Dodge Avenger. It hasn't shaken my car completely apart, but i think that if I try hard enough I could make it do so. It is never overpowering my car speakers that are amped, but I can feel it at volume 16 and it shakes my car at 22. My HU goes to 50 and I haven't even attempted 30. It is running on the RF R500X1D at 2 ohms running 628 watts. I think if you're looking for a thump this will more than do it.

Pros: clean tones, big rumbles, accurate and loud. stays on tone during long low bass.

Cons: It should have come with a grille to protect it, I will have to buy it separately. I think it deserves half a point knocked off for this, but I will round up to 5.

15 inch sound

Stephen from West Chicago il on 4/14/2017

2010 Chevrolet HHR
Crutchfield Customer Review (What's this?)

Great service and quick shippin Crutchfield for life

Pros: Crutchfield is awsome


Rockford Fosgate P2D4-15

Ohskie from Media, PA on 7/25/2016

Crutchfield Customer Review (What's this?)

Great sound




Hands-on research

Product Research

Enclosure Compatibility


Overview: The Rockford Fosgate Punch P2D4-15 is a 15-inch subwoofer with dual 4Ω voice coils. The sub features a StampCast steel frame, quick-release compression terminals, a Kevlar fiber reinforced paper cone, and Santoprene surround. An anodized aluminum voice coil former and spider venting help keep the subwoofer cool.

Dual 4Ω Voice Coils: The dual 4Ω voice coils offer wiring flexibility; when wired in parallel the woofer presents a 2Ω load, when wired in series the woofer presents an 8Ω load.

Steel Basket: The P2D4-15 subwoofer features a StampCast steel basket for added rigidity.

Compression Terminals: The P2D4-15 features spring post terminals which accommodate speaker wire up to 10 gauge.

CEA-2031 Compliant: Power handling on the P2D4-15 subwoofer conforms to CEA-2031 industry standards. This means the subwoofer has the capacity to handle power under continuous demand, not instantaneous power handling, that over time, can damage voice coils.

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: To improve the cosmetic look, a decorative trim ring is included that mounts over the flange of the woofer. When using the cast aluminum trim ring the woofer is first mounted with four screws, then the ring is placed on top of the woofer, aligning the final four holes of the woofer with ring. The other four screws are used for these holes to mount the ring and woofer to the enclosure. Without the trim ring the mounting height of the woofer is just under 15/16 of an inch, with the trim ring it's approximately 1-1/16 inches. The diameter of the trim ring is 16-3/8 inches.

Enclosure Compatibility

Sealed Box: Rockford recommends a sealed enclosure with an optimum internal volume of 1.58 cubic feet (from 1.3 to 3.5 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 2.66 cubic feet using one 4" diameter x 10" long port; this yields a tuning frequency of 32 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 32 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?

15 inches!! Great brand, hope it sounds great [ Donna  May 31, 2017 ]
After a lot of research into different subs, I choose the 15" Rockford Fosgate due to the fact that the 15" sub is able to move more air compared to a 12". After looking at the specs for this sub on the Rockford Fosgate website, I believe this is one of the better subs available. If you have the space for a 15" sub, I highly recommend this one. It also has an integrated grille which compliments the installation. [ Alan  Mar 06, 2017 ]
Big Rockford Fosgate fan [ Eric  Dec 13, 2015 ]