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Mobile Electronics Power Accessories

Rockford Fosgate

8-Inch 300-Watt Amplified Subwoofer Enclosure

$389.99 $279.99 Save $110.00

SKU: P300-8P

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In Stock
Ships by Aug 31
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Rockford Fosgate P300-8P is a self-contained amplified subwoofer enclosure designed to add bass to factory or aftermarket systems. It features an 8-inch high-output subwoofer paired with a 300-watt Class-D amplifier, all housed within a slim-design, vented enclosure. This unit is suitable for various vehicle applications, including trucks and small cars.

The enclosure is constructed from 5/8-inch MDF and covered in durable vinyl. It offers a variable low-pass crossover, adjustable bass boost, and a 0°/180° phase switch for sound tuning. Connectivity options include both speaker-level and traditional line-level inputs, and an intelligent auto turn-on/off circuit simplifies installation. A remote Punch Level Control is included for on-the-fly bass adjustment.
Show original supplier description
The Rockford Fosgate P300-8P is a versatile, all-in-one powered subwoofer system designed to enhance the low-end frequencies in any car audio setup, whether factory or aftermarket. It integrates a high-output 8-inch subwoofer with a 300-watt RMS Class-D amplifier within a compact, vented enclosure, making it an ideal solution for vehicles with limited space, such as trucks and smaller cars. Constructed from robust 5/8-inch MDF and finished with durable heat-activated vinyl, this enclosure is built to withstand the rigors of automotive use. The integrated amplifier is impedance-optimized for the proprietary 8-inch subwoofer, ensuring maximum performance. Key features for sound customization include a variable 12dB/octave low-pass crossover (50 Hz to 200 Hz), an adjustable bass boost EQ (0 dB to +12 dB), and a 0° to 180° phase control. Installation is facilitated by multiple input options, including high-level (speaker) and low-level (RCA) connections, accommodating both factory and aftermarket head units. The intelligent auto turn-on/off function eliminates the need for a separate remote turn-on wire by utilizing DC offset or audio sensing. For user convenience, a remote Punch Level Control is included, allowing bass adjustments from the driver's seat. The unit boasts CEA-2006 compliant power ratings and comes with a 1-year manufacturer warranty. Its slim dimensions (11.4" H x 17.6" W x 5.6" D) and quick-disconnect power/ground connectors further enhance its installation flexibility and allow for easy removal when cargo space is needed.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandRockford Fosgate
Part NumberP300-8P
CategoryMobile Electronics

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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