Gravity GR-EQP11 4-Way Car Parametric Equalizer

The Gravity GR-EQP11 is a 1/2 DIN 4-way car parametric equalizer designed to sit between your head unit and amplifiers, giving you detailed control over your vehicle's sound output. Unlike simpler graphic equalizers that adjust fixed frequency bands, the GR-EQP11's parametric design lets you target specific frequencies with adjustable bandwidth across four bands, plus a high-frequency shelving control. Each band provides up to 12dB of boost or cut, making it possible to address problem frequencies caused by road noise, speaker placement, or cabin acoustics. The unit supports front, rear, and subwoofer outputs, with dedicated subwoofer level and frequency selector controls for independent bass management.

Internally, the GR-EQP11 runs on a 30V bipolar switching power supply, which provides clean headroom for the signal processing without requiring external power components. The master volume control delivers up to 9 volts RMS of output, sufficient for driving most aftermarket amplifiers. Connectivity is handled through gold-plated RCA inputs and outputs for reliable signal transfer, and an AUX/MAIN input select switch allows you to toggle between sources. The night illumination feature keeps controls visible after dark, and the compact 1/2 DIN chassis fits neatly into most vehicle installations.