Take complete control of your mobile audio system with the Earthquake Sound EQ-4000BT v2. This 1/2 DIN 4-Band parametric equalizer can be installed up front for quick on the fly adjustments for real time tuning that is critical for any audio system. With audio streaming being more popular than ever, users can stream their favorite tunes and playlists directly from smartphones or other Bluetooth-enabled devices. Four input source options are available giving users maximum flexibility for a better listening experience. Subwoofer level and crossover frequency controls are also at the front panel making it easier for users to tailor low frequencies to their listening preferences. Whether used for personal or commercial audio systems, the new EQ-4000BT v2 will give you the ability to get the most out of your audio system and control the sound to suit your musical taste.