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 8:50 am #139489 sonicglueMember I tried it before, but not working. Still behaving strangely… I think I’ll buy the Ernie Ball. It works fine with this, is it?
