Gravity
Gravity GR-EQP11 4-Way Car Parametric Equalizer
Fine-tune every frequency in your car audio system with this 4-band parametric equalizer featuring 9V RMS output and subwoofer control.
$54.99*
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*Price sourced from Amazon.com. Last updated:Oct 20, 2026.Price and availability are subject to change — details.
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Overview
Key Features
TUNING - Four-band parametric EQ provides detailed control over key audio frequencies, allowing you to shape low, midrange, and high-frequency response for a more balanced, personalized in-car listening experience.
PRECISION - Each parametric EQ band supports up to ±12 dB boost or cut, giving installers and enthusiasts the adjustment range needed to reduce unwanted peaks or bring forward frequencies that need more presence.
OUTPUT - Master volume control delivers up to 9V RMS output, helping provide a strong preamp signal to compatible amplifiers while allowing convenient overall system-level adjustment from the equalizer.
BASS - Dedicated subwoofer level control makes it easy to raise or lower bass output independently of the main speakers, so you can adapt low-end impact for different music styles and listening preferences.
FLEXIBILITY - Subwoofer frequency selectors help tailor the bass section to the vehicle, speaker setup, and enclosure characteristics, supporting smoother integration between subwoofers and full-range speakers.
POWER - On-board 30V bipolar switching power circuitry supports stable operation for the GR-EQP11’s equalization and bass-control functions, making it a practical signal-processing component for car audio installations.
Specifications
Form Factor
1/2 DIN
Channels
4-Way (Front, Rear, Subwoofer)
EQ Type
4-Band Parametric
Boost/Cut
12dB per band
Master Volume Output
Up to 9 Volts RMS
Power Supply
On-Board 30V Bipolar Switching
Connectors
Gold-Plated RCA Input/Output
Input Selection
AUX / MAIN Select Switch
Subwoofer Control
Level Control + Frequency Selectors
Illumination
Night Illumination Design
Frequently Asked Questions
How many audio channels does the GR-EQP11 support?
It supports four output channels — front, rear, and subwoofer — allowing independent control over each section of your car audio system.
What size chassis does this equalizer use?
The GR-EQP11 uses a 1/2 DIN form factor, making it compact enough to fit in most vehicle dash configurations.
Does this unit require an external power supply?
No. It features an on-board 30V bipolar switching power supply, so it draws power directly from your vehicle's electrical system without additional components.
Can I use this with my existing head unit's RCA outputs?
Yes. It includes gold-plated RCA input and output connectors and an AUX/MAIN input select switch for flexible signal routing.
How much boost or cut does each EQ band provide?
Each of the four parametric EQ bands offers up to 12dB of boost or cut, giving you precise control over specific frequency ranges.
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