An Austin musician named Marvin plays both acoustic guitar and mandolin on stage and had difficulty switching instruments when running two separate Red-Eye setups. It also used up two XLR inputs on mix boards, and he had to swap his tuner around. When he swapped instruments, sometimes the unused instrument would be set down too close to a monitor and would cause feedback. He asked if I could make him a preamp that would make playing two instruments a bit less frustrating. So I made him the first "Twin".
Daren Appelt, Electronics Engineer