i wanted to add an input so i could run my theremin through it...but now im kind of afraid of messing with it. i had thought about some sort of limiter or something but im not exactly sure how to go about that because im not much of electronics guy. i was thinking maybe a small fixed pot that would only allow X amount of signal in but again. that was just my thought. seems like if i really want to go for this im gonna need to pick up a volt meter.