Gravity GR-EQP11 1/2-DIN 4-Band Car Parametric Equalizer

The Gravity GR-EQP11 is a 1/2-DIN car-audio signal processor that combines four-band parametric equalization with dedicated front, rear, and subwoofer outputs. It is designed for systems that need more control over tonal balance and subwoofer integration than a head unit’s basic tone controls can provide. A master volume control supports output levels up to 9 volts RMS.

This equalizer is suited to vehicle owners and installers building an amplified system with separate full-range and subwoofer signal paths. Its front, rear, and sub outputs provide a practical way to route processed signal to compatible amplifiers. The AUX/MAIN input selector also supports choosing between the unit’s available input sources.

The GR-EQP11 uses a four-band parametric EQ section with up to 12 dB of boost or cut. Each band has a specified bandwidth, while the high-frequency section includes shelving adjustment. These controls allow more deliberate correction or tailoring of the system’s frequency balance.

For bass-system setup, the GR-EQP11 includes separate subwoofer level control and subwoofer frequency selectors. This allows the subwoofer channel to be adjusted independently from the front and rear outputs. The result is a more manageable way to balance low-frequency output with the rest of the system.

An onboard 30-volt bipolar switching power supply supports the unit’s signal-processing section, and gold-plated RCA input and output connectors are provided for signal connections. Night illumination helps make the controls easier to locate in low-light conditions. Its compact 1/2-DIN format is intended for custom dash, console, or panel installations.

Key Features

• Up To 9V RMS Output: Provides a higher-voltage preamp signal for compatible amplifiers.
• Four-Band Parametric EQ: Lets you target and adjust multiple parts of the audio spectrum.
• 12 dB Boost/Cut: Provides meaningful adjustment range for each EQ band.
• Front, Rear And Sub Outputs: Routes processed signal to separate amplifier channels or zones.
• Subwoofer Level And Frequency Controls: Helps balance bass output within the overall system.
• Night Illumination: Makes the control panel easier to use after dark.

Design & Installation

The GR-EQP11 has a black metal enclosure and a compact 1/2-DIN form factor. Its control layout is designed around master level, equalization, and subwoofer adjustment functions. Gold-plated RCA connectors are used for the signal inputs and outputs.

Install the unit in a secure 1/2-DIN-compatible custom location with access to its controls, then connect it to compatible RCA-level source and amplifier connections. Use the AUX/MAIN selector to choose the desired input and set the master, EQ, and subwoofer controls gradually during system tuning. Installation hardware, wiring, and included accessories are not confirmed in the available product information.