Where can I get a copy of the Rumble LT Quick Start Guide? You can view and download the manual right here! Related articles Are there foreign-language translations of the Rumble LT Owner’s Manual? About Mustang LT & Rumble LT Amplifiers Where can I get the manual for the Rumble LT amplifier? How do I update the firmware on my Mustang LT or Rumble LT? Where can I get the manual for the Mustang LT amplifier?