How do I get help with an issue with the Rumble digital amp? Use the Submit a Request link at the top of this page to send a message to our Customer Support team. Related articles How do I update the firmware on a Mustang GT or Rumble digital amplifier? Can I use the Rumble digital amps without Fender Tone? What is the Rumble digital bass amplier? How do I name/rename my Rumble digital amp? What protocols does the Rumble digital amplifier require to operate over WiFi?