NICKEL PLATED LOCKING ADJUSTABLE KNOB: Our 7 Band Graphic Equalizer uses nickel plated adjustable knobs for ideal abrasion resistance and modern design. HI/LO CONVERTOR: The built in Hi/Lo convertor allows for easy integration to any OEM head unit. ADJUSTABLE SUBWOOFER FREQUENCY: Our 7 Band Graphic Equalizer allows you to adjust 60Hz / 90Hz subwoofer frequency. EASY INSTALLATION: Its universal Half-Din Chassis design ensures a smooth and convenient installation process ACTIVE GAIN PRE-AMPLIFIER: This equalizer possesses active gain pre-amplifier, greatly adjusts the input sensitivity. INDIVIDUAL LEFT AND RIGHT SENSITIVITY CONTROLS FOR AUXILIARY INPUT: This equalizer is uniquely designed with adjustable left and right sensitivity controls for auxiliary input. GOLD-PLATED RCA INPUT CONNECTORS: This equalizer uses gold plated RCA input and output for superior conductivity, maintaining audio integrity. THREE STEREO RCA OUTPUTS: This equalizer applies three stereo RCA outputs to drive front, rear, and subwoofer audio amplifiers. MAIN / AUXILIARY INPUT SELECTOR: This equalizer supports MAIN/AUX input, designed to meet your different audio sources. Description: Experience the ultimate sound customization with our Brand New 7 Band Graphic Equalizer! Featuring a 9V line driver and adjustable subwoofer frequency, you can fine-tune your audio to perfection. With its universal half-din chassis, active gain pre-amplifiers, and gold-plated RCA input connectors, this equalizer offers easy installation and top-notch performance. Don't settle for ordinary sound, unleash the full potential of your music with our 7 Band Graphic Equalizer!