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Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio — main product image
Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio
Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio
Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio
Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio
Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio
Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio
Gravity

Gravity GR-EQ9 7 Band Graphic Equalizer Car Audio

Take full control of your car audio with 7-band equalization, built-in crossover, and a bass-boosting Epicenter.

$54.99*
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*Price sourced from Amazon.com. Last updated:Oct 21, 2026.Price and availability are subject to change — details.

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Overview

The Gravity GR-EQ9 is a 7-band graphic equalizer designed to sit between your head unit and amplifiers, giving you precise control over your car's audio frequencies. Each of the seven bands can be adjusted via clearly marked sliders, letting you cut or boost specific frequency ranges to compensate for road noise, speaker placement, and cabin acoustics. The built-in 7-volt line driver ensures that the signal reaching your amplifiers is strong and clean, which is especially beneficial in systems with long RCA cable runs or when the head unit's preout voltage is low.

Beyond standard equalization, the GR-EQ9 includes an Epicenter bass restoration circuit that analyzes your music and regenerates low-frequency content, adding bass depth that may have been lost during recording or compression. A dedicated subwoofer output with its own level control lets you dial in bass independently of the main channels. The unit also features a 12dB crossover and AUX inputs for additional source flexibility. Housed in a compact half-DIN chassis, the GR-EQ9 fits into tight installation spaces and provides a cost-effective way to add meaningful sound-shaping capability to a car audio system.

Key Features

PRECISION - Shape your system’s sound with seven graphic EQ bands centered at 50Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, and 16kHz. Each band provides adjustable boost or cut for tuning bass, vocals, and treble.

SYSTEM - Three stereo RCA preamp outputs independently feed front, rear, and subwoofer amplifiers, making the EQ9 an effective signal-control center for multi-amplifier car audio systems with separate full-range and bass channels.

POWERFUL - Delivers up to 7V RMS preamp output voltage to provide a strong line-level signal for compatible amplifiers. The wide 10Hz-50kHz frequency response supports detailed low-frequency impact and extended high-frequency clarity.

CONTROL - Dedicated master volume, subwoofer level, and front-to-rear fader controls let you make quick adjustments from the dash. Select the main or auxiliary source directly on the equalizer for convenient listening control.

BASS - Built-in subwoofer equalization and an 18dB-per-octave electronic low-pass crossover help tailor low-frequency output for a subwoofer amplifier. Use the sub level control to blend bass response with front and rear speakers.

INSTALLATION - Compact 1/2 DIN chassis measures approximately 7 x 4-1/8 x 1 inches for custom dashboard placement. ISO mounting holes, a removable trim ring, gold-plated RCA connectors, and 11-15V negative-ground operation simplify integration.

Specifications

Type
7-Band Graphic Equalizer
Chassis Size
1/2 DIN
Line Driver Output
7V RCA
Crossover
12dB
Inputs
AUX inputs
Subwoofer Output
Yes, with independent level control
Epicenter
Built-in bass restoration

Frequently Asked Questions

The Epicenter is a bass restoration processor that detects and regenerates low-frequency harmonics in your music, adding depth and impact to your bass without simply boosting volume.
Yes, you can feed the GR-EQ9's AUX inputs from your head unit's RCA preouts and then run the equalizer's high-voltage RCA outputs to your amplifiers for refined signal control.
The GR-EQ9 features a 7-volt line driver output, which provides a strong, clean signal to your amplifiers and helps reduce noise over longer cable runs.
Yes, it has dedicated subwoofer outputs with a separate subwoofer level control, letting you fine-tune bass independently from the main channels.
The GR-EQ9 uses a half-DIN (1/2 DIN) chassis, making it compact enough to fit in tight dash locations or mounting spaces.

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