Enclosed Subwoofers 101

An enclosed subwoofer is a box with a subwoofer already installed. The advantage to buying an enclosed sub is that the manufacturer made the sub, then designed and built the box as a perfect match, so you'll get the best possible performance. Every enclosed sub has a maximum RMS power handling rating, so pair it with an amp with a similar RMS power rating to get the best performance.

Our take on the Rockford Fosgate Punch P1-2X12

by Jo Greene

Rockford Fosgate's P1-2X12 ported enclosure fills your ride with juicy, high-volume bass, so you and your passengers can rock out to the latest beats. The enclosure houses two Punch P1 12" woofers that feature paper cones reinforced with Kevlar fibers, supported by rubber surrounds. Heavy-duty motor assemblies and advanced cooling vents allow each of these subs to handle up to 250 watts RMS without flinching.

Rugged 5/8" medium-density fiberboard construction means this enclosure will hold strong for fat, heavy bass. Industrial-grade black carpet provides a clean, finished look, and protects your trunk from nicks and scratches. This enclosure uses an advanced port design that promotes generous air movement, while reducing distortion-causing port noise, so you hear louder, deeper bass. Add an amp and some wiring, and feel the thick low end this enclosure adds to your ride.

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Highlights:

ported hatchback-style enclosure with two 12" Punch P1 subwoofers
5/8" medium density fiberboard construction covered with black carpet
2-ohm total impedance
power handling: 100-500 watts RMS
peak power: 1000 watts
frequency response: 25-250 Hz
sensitivity: 86 dB
33-7/8"W x 15-1/8"H x 16-5/8"D1 x 13-7/8"D2
warranty: 1 year
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Features and specs chart | What’s in the box? | In-depth notes

Features and Specs

General
Woofer Size (inches) Loading...	12 x 2
Woofer Material Loading...	Kevlar/Paper
Enclosure Type Loading...	Ported
Color Loading...	Black
Pieces in System Loading...	1
Width (inches) Loading...	33-7/8
Height (inches) Loading...	15-3/8
Depth (inches) Loading...	16-5/8
Second Depth (inches) Loading...	13-7/8
Connector Type Loading...	Spring post
Frequency Response Loading...	25-250 Hz
Power Range (Watts RMS) Loading...	100-500
Maximum Wattage Loading...	1000
Sensitivity Loading...	86 dB
Impedance Loading...	2 ohms
Parts Warranty Loading...	1 Year
Labor Warranty Loading...	1 Year

Product Research

What's in the box?

Download owner's manual

Vented subwoofer enclosure loaded with two Punch P1S4-12 12" Woofers
Installation and Operation Instructions

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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 open the box, verify contents, 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.

Features

Punch Woofer: The enclosure houses two front-firing Rockford Fosgate Punch P1S4-12 12" subwoofers. The 4-ohm, single voice coil subs are internally wired in parallel to present a 2-ohm load. Each subwoofer features a StampCast steel frame, a Kevlar fiber reinforced paper cone, and NBR surround (Nitrile Butadiene Rubber). Anodized aluminum voice coil formers and spider venting help keep the subwoofers cool.

Spider: A compliant linear spider made from tear and fatigue resistant poly-cotton improves mechanical stability under high excursion, maintaining consistent excursion characteristics.

Solid MDF Construction: The enclosure is constructed of high quality 5/8" MDF (medium-density fiberboard), which resists flexing and has anti-resonant qualities.

Vented Enclosure: The vented enclosure is aided by precision construction through computer design. The enclosure consists of two front firing 12" Punch P1 series subwoofers with a proprietary high-flow, low-noise port. The speaker terminals are located on the left side of the box (when facing the box). The box is covered in black carpet.

Tuned Port: The enclosure uses a front-firing proprietary high-flow, low-noise port to help produce deep and loud bass efficiently.

Box Carpeting: The enclosure is finished with high-density carpeting for superior durability. The carpet is black.

Speaker Terminal: The subwoofer enclosure uses one pair of high current, spring loaded binding posts. The binding posts are located on the left side of the box and will accept pin connectors, single or dual banana plugs, or bare wire up to 10 gauge.

Power Handling: The subwoofer can handle up to 500 watts RMS; 1000 watts peak power.

CEA-2031 Compliant: Power handling on the P1S4-12 subwoofers conforms to CEA-2031 industry standards. This means the subwoofer has the capacity to handle its rated power under continuous demand, not just for an instant.

Dimensions: The depth dimensions listed in Features & Specs include the subwoofer's trim ring, which adds approximately 7/8 of an inch. The depth of just the enclosure is 15-3/4 inches at the base and 13 inches at the top.