Home › Forums › Products › Stompboxes › Aux switch and BOSS FV-500L expression pedal with H9 › Reply To: Aux switch and BOSS FV-500L expression pedal with H9 June 29, 2015 at 3:29 pm #139496 nickroseModeratorEventide Staff Ernie Ball is good – make sure you get the lowe impedance (25K) version. Correction to my previous post – when I said "turn it off," I was referring to the autocalbration feature.
