The FV-30H is designed to be connected before guitar effect units in the signal chain, Tuner output.
BOSS QUALITY IN SPACE-SAVING DESIGNS FOR YOUR PEDALBOARD The FV-30H and FV-30L are compact foot volume pedals with kickin' new designs. They've been specially created for saving space on your pedalboard while maintaining the trusted BOSS standard for sound quality, reliability, and durability. These pedals are 100-percent professional grade, aluminum die-cast units, and feature smooth pivot action that supports subtle changes in volume control. Thanks to their small size, the FV-30H and FV-30L offer a huge advantage for traveling musicians and gigging players who need to maximize pedalboard space.
As with the other models in the FV series, two different pedal versions allow you to choose the best type for your specific application: FV-30H,A high-impedance pedal (with dedicated tuner output) that's best for connecting directly to an electric guitar or bass.
Space-saving volume pedals with rugged aluminum die-cast body designs
Silky feel with smooth pivot for maximum control
Tuner out jack (FV-30H)
Stereo input and output (FV-30L)
FV-30H for direct connection to high-impedance gear like electric guitars
FV-30L for low-impedance gear like synthesizers and stompboxes