- HPF passive filter with resonnance controler and 2 character mod ( hifi / vintage ( switch beetween the 2 inductors )
- Left switch is the General bypass
- Right switch is the bypass of resonnace pot ( to have full res )
- Red knob control the resonnace ( 3 to 18db )
- Routing : I use the insert point of Subgroup ( Y cable ) Nothing more !