I use an Ameritron AL-1200 with my 756PROII with no trouble at all. Carl Yaffey O----'-:: K8NU Yaffey Music Services: banjo/guitar/bass/mandolin lessons, recording studio. carl_yaffeyADDED_TO_STOP_SPAM at yahoo.com, 614 268 6353, Columbus OH http://www.carl-yaffey.com