The many features of the Invective MH will satisfy even the most discerning of gear heads. The onboard T.S.I.„ (Tube Status Indication) circuit helps the user diagnose a problem with the power tubes. The bias adjustment pot is located on the top of chassis. Additionally, foot switches allow the Invective MH to engage or disengage the Tight voicing and any combination of Gate and Boost on the Lead channel, respectively. Theres also an independently foot-switchable buffered effects loop.