Why this unit matters Tune your car audio precisely with a 7-band graphic equalizer and an integrated pass filter to remove unwanted frequencies and improve overall clarity. Match levels and avoid distortion using the variable gain control so the equalizer sits correctly between your head unit and amplifier. Add usable subwoofer control with an adjustable volume and selectable crossover range (35–250 Hz) for tight, controlled bass without guesswork. Designed for easy integration: accepts high-level (speaker) inputs so you can connect to factory or aftermarket stereos without complex wiring changes. Key benefits at a glance Precise tonal control: Seven adjustable frequency bands let you correct room/vehicle resonances and tailor sound to your music and speakers. Seamless integration: High-level input support simplifies installation with factory head units that lack preamp outputs. Controlled bass: Dedicated subwoofer level control and crossover handling keep low-end punch clear and balanced. Level matching: Variable gain prevents clipping and noise by aligning the equalizer’s output with the rest of your system. Core features 7-band graphic equalizer with adjustable sliders for fine-frequency shaping Integrated pass filter to limit or remove unwanted frequency ranges Variable gain adjustment for accurate level matching High-level speaker input for direct connection to most car stereos Subwoofer volume control with crossover adjustable between 35 and 250 Hz Practical compatibility and performance notes Works with factory and aftermarket head units that provide speaker-level outputs. Ideal for systems with an external amplifier and/or subwoofer; helps protect speakers by removing infrasonic content and reducing distortion. Compact design suitable for common car installations; wiring uses standard audio connections for straightforward hookup. Typical use cases 1. Upgrade a factory stereo: Add full EQ capability and subwoofer control to a vehicle that lacks tone controls or preamp outputs, without replacing the factory head unit. 2. Integrate a subwoofer: Use the dedicated sub level and 35–250 Hz crossover range to blend a powered subwoofer with your existing speakers for controlled low-end response. 3. Fine-tune for different content and cabin conditions: Quickly adjust the seven bands to compensate for road noise, passenger load, or to optimize sound for rock, jazz, or vocal-centric playlists. What to expect after installation Better clarity, tighter bass, and a more balanced soundstage through targeted frequency adjustments and correct signal levels. Easier integration into factory or aftermarket systems, reducing the need for additional converters or major component changes. Specifications (functional) 7-band graphic equalizer Integrated pass filter Variable gain control High-level (speaker) input compatibility Subwoofer control with frequency range 35–250 Hz Installation tip Match the variable gain to your head unit or amplifier output level before making EQ adjustments. Start with flat EQ, set gain to avoid clipping, then fine-tune each band and the subwoofer level for best results.