Home › Forums › Products › Stompboxes › Need to use the H9 for a db boost live! › Reply To: Need to use the H9 for a db boost live! April 3, 2015 at 11:28 am #138714 gkellumParticipant If you long press the left footswitch, it lets you adjust the gain. Depending on whether the left footswitch is in active or bypass, it will let you adjust input level or output level. The exact details are described in the H9 user manual.
