The Tech21 SansAmp Programmable Bass Driver DI is designed with the discerning bassist in mind, offering a 3-channel, programmable rig-in-a-box that delivers a variety of rich tones. Similar to the TRI-A.C. for guitar, it provides three distinct tones easily accessible at your feet. This all-analog unit maintains the familiar controls of its predecessor, such as Drive, Bass, Treble, Presence, Blend, and Level, while adding the convenience of digital programmability. Simply adjust the knobs to find your desired tone, double-tap a footswitch to save it, and you're ready to play.