I changed the batteries in my Ibby today, and knowing the active preamp would cause distortion in my 25-watt Ampeg, I set the volume around 7, and the bass/mids/treble at 1. The tone was really muddy and distorted no matter what I did with my tone controls(it was so muddy that I couldn't really hear it if I turned the volume down). Every note I played produced a loud popping sound from the amplifier.
When I finally cranked the treble all the way up, all I got was harsh, blaring feedback.
I turned my amp off, turned it back on, and heard what sounded like a radio broadcast.
I turned it of and back on again; all I heard when I played was a muffled, sub-bass growl.
Has anyone encountered this before??