Where can I get the expanded manual for the Rumble digital amplifier? You can view and download the manual right here! Related articles How do I update the firmware on a Mustang GT or Rumble digital amplifier? Are there foreign-language translations of the Rumble digital amp Expanded Owner’s Manual? How do I use my EXP-1 expression pedal with the Rumble digital amp? Will my Rumble digital amp connect to my last paired device? How do I browse and download new Tone presets?