Rockford Fosgate P3SD2-12 12" Shallow Mount Subwoofer (Slim Truck Subwoofer, 400W RMS Dual 2 Ohm)

Availability Note:
This item is available by special order. Contact us for current availability and lead time.

Overview

If you’re tight on space but still want real bass, this is where a shallow subwoofer makes sense.

The Rockford Fosgate P3 shallow 12" is built for setups where a standard sub won’t fit, like under-seat truck enclosures or compact boxes. It gives you solid low-end without needing a ton of mounting depth.

This is a good option for clean, space-saving installs that still deliver noticeable output.

What You’re Getting

This is a 12" shallow mount subwoofer available in two configurations:

• Dual 2 Ohm (P3SD2-12)
• Dual 4 Ohm (P3SD4-12)

Both are rated at 400 watts RMS and built using Rockford’s Punch series design.

How It Performs

For a shallow sub, this one hits harder than most.

You’ll get solid low-end response with good output, especially in properly designed enclosures. It’s not meant to replace a full-depth competition setup, but for space-limited builds, it does exactly what it’s supposed to do.

This is the kind of sub that works well in daily-driven trucks where space matters.

Installation

This subwoofer is designed for shallow enclosures, making it a good fit for:

• Under-seat truck boxes
• Behind-seat enclosures
• Custom low-profile builds

Mounting depth is just over 3.5", which opens up a lot of install options compared to standard subs.

Built for Real Use

The P3 shallow series uses a durable design with a cast basket, anodized aluminum cone, and reinforced surround.

It’s built to handle daily use without breaking down, even in tighter enclosures where heat and movement can be a factor.

Why Buy From Us

We’ve been building truck audio systems for over 30 years.

If you’re not sure which version you need or what enclosure works best, you’re talking to people who deal with this stuff every day.

What’s Included

• (1) Rockford Fosgate P3 12" Shallow Subwoofer
• Trim ring (optional grille compatible)

Specifications

General:

• Speaker Size: 12"
• Subwoofer Type: Shallow Mount
• Voice Coil Type: Dual Voice Coil

Power Handling:

• RMS Power: 400 Watts
• Max Power: 800 Watts

Impedance Options:

• P3SD2-12: Dual 2-Ohm
• P3SD4-12: Dual 4-Ohm

Dimensions:

• Mounting Depth: 3.65"
• Cutout Diameter: 11.22"

Performance:

• Frequency Response: 50 Hz – 20 kHz
• Sensitivity: 85 dB @ 1W/1M
• Xmax: 8.4 mm (D2) / 8.1 mm (D4)

Enclosure Recommendations:

• Sealed Box: 1.0 cu. ft.
• Vented Box: 1.25 cu. ft.

Quick Questions

Q: What’s the difference between Dual 2 Ohm and Dual 4 Ohm?
A: It depends on how you’re wiring your system and what amplifier you’re using. If you’re unsure, ask and we’ll point you in the right direction.

Q: Will this fit under my truck seat?
A: In most cases, yes when paired with the correct enclosure. We can help confirm fitment.

Q: Is this as loud as a full-depth subwoofer?
A: Not quite, but for a shallow sub, it delivers strong output and works well in space-limited setups.