Overview

If you want real bass in a truck without giving up your whole back seat, this is the move.

The Rockford Fosgate P300-12T is a slim, all-in-one powered subwoofer built specifically for truck applications. It combines a 12" subwoofer and a 300-watt amplifier into a single enclosure that’s designed to fit behind or under seats—while still delivering strong, usable low-end.

What It Is

A complete bass system in one enclosure.

• 12" high-output subwoofer
• Built-in 300W Class-D amplifier
• Slim, truck-friendly enclosure

No separate amp. No guessing. Just add power, ground, and signal.

Why This One

The 12" gives you more depth than smaller powered subs.

• Deeper bass than 8" or 10" options
• More output in larger cabins like trucks
• Balanced performance without getting sloppy

This is a solid middle ground between convenience and real bass.

Installation

Designed to be quick and clean.

• Works with factory or aftermarket systems
• High-level (speaker wire) and low-level (RCA) inputs
• Auto turn-on (no remote wire needed in most installs)
• Quick disconnect power and signal connections

Easy to install—and easy to remove if you need space.

Tuning & Control

Simple adjustments to dial it in.

• Variable low-pass crossover (50Hz–200Hz)
• Bass boost (0 to +12dB)
• Phase control (0°–180°)
• Included remote bass knob

You can fine-tune it without overcomplicating things.

Build Quality

Built to handle daily use.

• 5/8" MDF enclosure for solid acoustics
• Heat-activated vinyl finish
• Extruded aluminum heatsink
• Thermal and voltage protection built in

What’s Included

• 12" Powered Subwoofer Enclosure (P300-12T)
• Integrated 300W Amplifier
• Remote Bass Level Control
• Quick Disconnect Power & Signal Connections

Specifications

Power:

• 300 Watts RMS

Woofer:

• 12" High-Output Subwoofer

Enclosure:

• Sealed
• 5/8" MDF construction

Frequency Response:

• 20 Hz – 200 Hz

Crossover:

• Variable 50 Hz – 200 Hz (12dB/Octave)

Controls:

• Bass Boost: 0 to +12 dB
• Phase: 0° – 180°

Inputs:

• High-Level (Speaker Wire)
• Low-Level (RCA)

Dimensions:

• 15" H x 25.8" W x 4.8"–8.5" D (wedge design)

Quick Questions

Q: Is this enough bass for a truck?
A: For most daily drivers—yes. It’s a noticeable upgrade over factory systems.

Q: Will it fit behind my seat?
A: That’s what it’s designed for, but always double check measurements.

Q: Is it better than the 8" or 10"?
A: Yes. The 12" gives you deeper and fuller bass.

Note

This is an all-in-one bass solution focused on clean install and everyday performance—not a full custom SPL setup.