Dec 18, 2008 #1 T Thomas Member May 13, 2008 582 0 16 I have a fender super champ xd and want to replace the stock 12AX7 for a 12AU7, will it cause any problems?
I have a fender super champ xd and want to replace the stock 12AX7 for a 12AU7, will it cause any problems?