Revv G20 tube amp head 20/4W with Two Notes Torpedo IR cabinet load box. 2 Channels, FX Loop, MIDI and more. The G20 is the high-gain follow up to the world's first Two notes Torpedo-Embedded amp. Crushing & Clear high gain tones developed with leading artist and music producers.Reactive Load is automatically turn on when the speaker is not connected to protect the amp. This all-tube head has an optional reactive load for organic feel and tone when playing without a cab and hosts virtual cabs onboard for direct recording, silent playing or live performance without a microphone. Set out to build an amp that not only has this new modern featureset but sounds amazing on its own as a standalone clean/crunch platform amp. Now the G20 brings you all of that functionality and tone + amazing fire-breathing gain built right in.