The B600H amp has 2 inputs”one for passive pickups, the other for active”plus input gain and output volume controls. The clip indicator lets you know when your signal is overdriving the preamp, although with the harmonically rich distortion of the B600H's preamp circuit, that just might be what you want. The mute function coupled with the rear-panel tuner send lets you tune silently on stage. Add the 6-band EQ and notch filter into the mix and you've got total tone control. .