Gravity GR-BASS Digital Bass Restoration Processor

The Gravity GR-BASS is a digital bass restoration processor for aftermarket car audio systems. It is designed to recreate and inject low-frequency information into the signal path, helping restore bass detail that may be reduced in certain recordings or source material. This makes it a focused upgrade for listeners who want more control over low-frequency response without changing their amplifiers or speakers.

Rather than functioning as an amplifier, the GR-BASS processes an existing audio signal before it reaches the rest of the system. Its bass restoration and equalization functions are intended to add low-end presence while allowing the user to tailor the effect to the system and music being played. Adjustable frequency, width, and level controls provide a practical way to tune the bass effect instead of applying a fixed boost.

The processor supports up to 15V RMS input and provides up to 13.5V peak output. Its specified 10 Hz to 100 kHz frequency response, 0.003% THD rating, and high input-noise rejection are intended to support clean signal handling within a car audio installation. A high-headroom PWM power supply supports stable operation in a vehicle electrical system.

A lighted bass restoration display provides output-level feedback, while the included dash-mount remote control lets the driver adjust bass level from the front seat. This is useful when changing between recordings with different low-frequency content or when adapting the system for different listening preferences. The remote is designed for convenient in-car access rather than requiring adjustment at the processor itself.

The GR-BASS is suited to systems using an aftermarket head unit, amplifier, and subwoofer setup, as well as installations where the owner wants to add bass restoration as a separate signal-processing stage. Its compact 9-inch-wide chassis can be mounted in many common vehicle locations when protected from moisture and heat. Careful level matching and conservative adjustment are recommended to maintain balanced system performance.

Key Features

• Digital Bass Restoration: Recreates low-frequency information within the audio signal path.
• Adjustable Bass Controls: Frequency, width, and level settings tailor the restoration effect.
• Dash-Mount Remote: Provides convenient bass-level adjustment from the driver’s seat.
• Lighted Output Display: Shows bass restoration output level up to 13.5V.
• High-Headroom PWM Supply: Supports stable signal-processing operation in vehicle applications.
• Low-Distortion Signal Path: Rated at 0.003% total harmonic distortion.

Design & Installation

The GR-BASS uses a compact processor format measuring 9 inches wide by 6.5 inches deep by 2.75 inches high. Its documented design includes gold-plated contacts, illuminated controls, a lighted bass restoration display, and a high-headroom PWM power supply. The compact footprint helps it fit into custom audio installations while retaining accessible adjustment controls.

Install the GR-BASS as a signal-processing component in an aftermarket car audio system, with appropriate power, ground, fuse protection, and audio-signal connections. Use the included dash-mount remote where it can be safely reached by the driver, and set input and output levels carefully to avoid overdriving downstream equipment. The processor draws 150 mA and has a recommended 3A fuse rating.