Gravity GRWF10 10" Powered Under-Seat Subwoofer

The Gravity GRWF10 is a compact 10-inch powered subwoofer designed to add low-frequency output to a vehicle audio system without requiring a separate amplifier enclosure in the trunk. Its low-profile under-seat format is intended for cars, trucks, and SUVs where available cargo space is limited. The integrated design combines the subwoofer enclosure and amplification in one wired unit.

This model is a practical upgrade for listeners who want more bass presence from a factory or aftermarket speaker system. It is intended to supplement full-range speakers rather than replace them. Its compact enclosure makes it especially suited to installations where a conventional subwoofer box would be impractical.

The GRWF10 uses a 10-inch driver in an active, enclosed powered-subwoofer configuration. Published product data identifies a 2-ohm subwoofer load, a 20 Hz to 150 Hz frequency-response range, and a signal-to-noise ratio above 90 dB. A built-in low-pass filter helps limit the unit to the bass range it is designed to reproduce.

System-tuning controls include adjustable bass boost and phase-shift adjustment. The bass boost can increase low-frequency emphasis, while phase adjustment can help the subwoofer blend more smoothly with the vehicle's main speakers. A fixed 20 Hz subsonic filter is also listed in published technical data.

The GRWF10 supports wired signal connections and is listed with high-level input capability for integration with systems that use speaker-level outputs. Its automatic power on/off function is intended for high-level connections, reducing the need for a separate turn-on arrangement in compatible installations. For a complete upgrade, it should be professionally wired to the vehicle's electrical system and secured in a location with adequate clearance and ventilation.

Key Features

• 10-Inch Powered Design: Combines a 10-inch subwoofer and built-in amplifier in one enclosure.
• Under-Seat Profile: Fits applications where trunk-mounted bass systems are not preferred.
• High-Level Auto Turn-On: Supports automatic activation when using high-level signal connections.
• Adjustable Low-Pass Filter: Lets the bass frequency range be tailored to the system.
• Variable Bass Boost: Provides adjustable low-frequency emphasis for personal tuning.
• Phase Shift Control: Helps align bass output with the rest of the vehicle audio system.

Design & Installation

The GRWF10 is listed as an active enclosed subwoofer with an aluminum housing and a rectangular, low-profile form factor. Its compact 15 x 11.4 x 3-inch unit dimensions are designed for under-seat or other space-conscious vehicle mounting locations. A bi-color power-status LED provides a visible operating indication.

Before purchase, measure the intended mounting area for clearance around the 15 x 11.4 x 3-inch enclosure and allow room for wiring and ventilation. Installation requires a wired vehicle-audio connection and power wiring; high-level input capability can help it integrate with factory systems that do not provide dedicated RCA preamp outputs. Secure the enclosure firmly rather than leaving it loose beneath a seat, and set gain, low-pass filter, bass boost, and phase controls after installation.