Gain and Volume work together to set how hard the pedal drives the amp. Treble and Bass cut or boost by up to 15 dB each. The EQ shapes the tone even at low boost settings.

The design aims to keep the guitar's character while lifting its level and harmonics. For that reason, many players use it as an always-on pedal. Higher supply voltages give more headroom.

The Classic keeps the simple layout of one footswitch and four knobs. Xotic also sells the RC Booster V2 as a separate model in the same line, so check which version a listing refers to.