Tech 21 SansAmp Bass Driver DI - PROGRAMMABLE 3 CHANNEL PREAMPLIFIER FOR BASS

(This text is machine translated) Like the TRI-A.C. for guitar, three warm sounds available right at your toes. The all-analog circuitry features the same controls as its single-channel predecessor: Drive, Bass, Treble, Presence, Blend and Level. Digital only in its programmability, just change the knobs until you find a sound, double tap the foot switch, and it will be saved in that channel.