Name: Rockford Fosgate P2D4-12
Brand: Rockford Fosgate
SKU: 5751P2D412
Price: 169.99 USD
Availability: LimitedAvailability
Rating: 5 (129 reviews)

Overview

by Crutchfield's Jo Greene

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.

Bulletproof bass

Engineers at Rockford Fosgate designed the P2D4-12 12" 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 P2D4-12 sub works equally well in a sealed or ported enclosure, so you can choose the kind of bass you want for your system.

Subwoofer Wiring Diagrams

To see sample wiring diagrams for all common subwoofer/amplifier combinations, check out this informative article.

Product highlights:

12" 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: 27-250 Hz
sensitivity: 86 dB
top-mount depth: 6-3/8"
sealed box volume: 0.70-1.80 cubic feet
ported box volume: 1.79 cubic feet
grille not included
warranty: 1 year
MFR # P2D4-12

What's in the box:

Rockford Fosgate P2D4-12 owner's manual

One 12" 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)

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Details

Researched by Crutchfield's Pat M.

Features & specs

Features and Specs
Size	12 -inch
Impedance (Ohms)	2, 8
Cone Material	Kevlar reinforced paper
Surround Material	Santoprene
Port diameter (inches)	4
Port length (inches)	10
Free-Air	No
Dual Voice Coil	Yes
Sensitivity	86 dB at 1 watt
Frequency Response	27 - 250 Hz
Max RMS Power Handling	400
Peak Power Handling (Watts)	800
Top Mount Depth (inches)	6 3/8
Bottom Mount Depth (inches)	N/A
Cutout Diameter or Length (inches)	11 1/16
Vas (liters)	81.5
Fs (Hz)	27.2
Qts	0.54
Xmax (millimeters)	10
Parts Warranty	1 Year
Labor Warranty	1 Year
Box Requirements
Ideal Sealed Box Volume (cubic feet)	1.02
Minimum Sealed Box Volume (cubic feet)	0.7
Maximum Sealed Box Volume (cubic feet)	1.8
Ideal Ported Box Volume (cubic feet)	1.79
Minimum Ported Box Volume (cubic feet)	N/A
Maximum Ported Box Volume (cubic feet)	N/A

The Rockford Fosgate P2D4-12 replaces these items:

Product Research

Features
Enclosure Compatibility

Features

Overview: The Rockford Fosgate Punch P2D4-12 is a 12-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 mono load.

Steel Basket: The P2D4-12 subwoofer features a StampCast steel basket for added rigidity.

Compression Terminals: The P2D4-12 features spring post terminals which accommodate speaker wire up to 10 gauge.

CEA-2031 Compliant: Power handling on the P2D4-12 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 over 7/8 of an inch, with the trim ring it's approximately 1-1/16 inches. The diameter of the trim ring is 13-5/16 inches.

Enclosure Compatibility

Sealed Box: Rockford recommends a sealed enclosure with an optimum internal volume of 1.02 cubic feet (from 0.7 to 1.8 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 1.79 cubic feet using one 4" diameter x 10" long port; this yields a tuning frequency of 40 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 34 Hz).