Where can I get the expanded manual for the Mustang GT amplifier? You can view and download the manual right here! Related articles Where can I get the expanded manual for the Mustang GTX amplifier? Fender® Guitar Amplifier Owner's Manuals Where can I get a copy of the Mustang GT Quick Start Guide? How do I use the MGT-4 4-Button footswitch with the Mustang GT amps? How do I update the firmware on my Mustang LT or Rumble LT?