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? Where can I get a copy of the Mustang GT Quick Start Guide? Fender® Guitar Amplifier Owner's Manuals How do I update the firmware on my Mustang LT or Rumble LT? Fender Mustang™ Micro Plus Firmware Update Instructions