The All-In-One Bass Box The SGT-DI preamp and DI gives modern bassists an entire rig in a single stompbox. It delivers an enhanced Super Grit Technology overdrive circuit featuring iconic Ampeg SVT and B15 voices, versatile 3-band EQ now with sweepable mids, Ultra-Hi and 3-way Ultra-Lo switches, a variable compressor, and an Aux /Headphone section. Plus! Introducing the first IR Loader/Cab Simulator from Ampeg. Choose from three classic factory cabs or up to three cabs of your own by using the free Ampeg IR Loader application. Combining time-tested Ampeg tone with modern capabilities, the SGT-DI demonstrates our commitment to honoring our legacy while also serving the needs of contemporary players.