Behringer V-Tone Acoustic Driver DI ADI21 Amp Modeler/Direct Recording Preamp/DI Box Analog modeling acoustic guitar preamp/stompbox with DI recording output This BEHRINGER product has been designed to compete head to head with leading products on the market Authentic tube/microphone modeling circuitry provides the natural warmth and presence, as if your acoustic guitar was miked through a tube pre-amp Ultra-musical 3-band EQ with sweepable mids for accurate feedback control and to eliminate the harsh harmonics of piezos Super-high impedance to retain maximum signal integrity and dynamics