The Red-Eye Twin Instrument Preamp offers a simple, one-box, direct-connect solution for musicians that play two instruments at the same gig or have an instrument with dual pickups. The Red-Eye Twin works well with instruments having passive or active piezo pickups, electret microphones or magnetic pickups such as electric guitars and basses. Performers that find the Red-Eye Twin useful are, for example, those playing fiddle and mandolin, guitar and mandolin, string bass and electric bass or dual pickup instruments