Rockford Fosgate P3SD2-8 8" Dual 2-Ohm Shallow Subwoofer

The Rockford Fosgate P3SD2-8 is an 8-inch shallow-mount car subwoofer built for vehicles where conventional subwoofer depth is difficult to accommodate. Its compact mounting depth helps make bass upgrades possible in tight locations such as under seats, behind truck seats, or in space-conscious custom enclosures. This model uses dual 2-ohm voice coils to provide wiring flexibility when matching a compatible mono or multi-channel amplifier.

Rated for 150 watts RMS and 300 watts maximum power, the P3SD2-8 is intended for a modest but capable bass system rather than a high-power competition installation. Its 38-250 Hz frequency response supports low-frequency reinforcement for music in a broad range of vehicle audio systems. An 82 dB sensitivity rating and shallow motor design help balance installation practicality with low-end output.

The woofer uses an anodized aluminum cone and dustcap, paired with an M-Roll Santoprene surround. These materials are designed to provide a rigid moving assembly while allowing controlled cone travel. A dual linear spider and aluminum voice-coil former support the subwoofer's suspension and voice-coil assembly.

Rockford Fosgate uses a StampCast basket with integrated spider venting on this model. The venting design helps move air around the motor area during operation, while the basket is intended to provide a stable mounting structure. Dual 10-AWG compression terminals provide a substantial connection point for speaker wiring.

The P3SD2-8 can be used in either a sealed or vented enclosure, allowing the installation to be tailored to available space and desired system response. Rockford Fosgate specifies a 0.25 cubic-foot sealed enclosure or a 0.75 cubic-foot vented enclosure for this driver. It is a practical option for a compact amplified subwoofer system when enclosure volume, amplifier impedance capability, and mounting clearance are planned together.

Key Features

• Shallow-Mount Design: Fits installations with limited mounting depth.
• Dual 2-Ohm Voice Coils: Supports series or parallel wiring configurations.
• 150-Watt RMS Rating: Matches appropriately powered compact subwoofer amplifiers.
• Anodized Aluminum Cone: Provides a rigid cone material for bass reproduction.
• StampCast Basket: Supports the driver while limiting unwanted basket resonance.
• Sealed Or Vented Compatibility: Allows enclosure selection for available space and tuning goals.

Design & Installation

The P3SD2-8 combines an anodized aluminum cone and dustcap, M-Roll Santoprene surround, dual linear spider, and aluminum voice-coil former. Its StampCast basket incorporates spider venting, and the shallow motor assembly reduces required installation depth. A diamond-cut cast aluminum trim ring is part of the driver design, while a compatible grille is offered separately.

Confirm the 7.13-inch cutout requirement and 2.66-inch mounting-depth requirement before beginning an installation. Use an enclosure built to the specified internal volume, accounting for the subwoofer's 0.040 cubic-foot displacement, and connect both voice coils using a wiring configuration that is safe for the amplifier. Rockford Fosgate recommends an active 80-100 Hz low-pass crossover at 12 dB per octave for subwoofer operation.