![So I just received my GA-FC and this EV-5 expression pedal for my Mk2 100w and I can't get the expression pedal to change from a master volume to a wah. I So I just received my GA-FC and this EV-5 expression pedal for my Mk2 100w and I can't get the expression pedal to change from a master volume to a wah. I](https://preview.redd.it/ezm95jngvpj41.jpg?width=640&crop=smart&auto=webp&s=e06ac27ed69a02c14c5423be4a044f5cbf0550c1)
So I just received my GA-FC and this EV-5 expression pedal for my Mk2 100w and I can't get the expression pedal to change from a master volume to a wah. I
![Haven't seen a lot of examples of boards that implement the GA-FC, so here's the one I just put together! (Also posted in r/guitarpedals) : r/BossKatana Haven't seen a lot of examples of boards that implement the GA-FC, so here's the one I just put together! (Also posted in r/guitarpedals) : r/BossKatana](https://external-preview.redd.it/--Gqmw0fwlJ80yJv-7nCKGTz2O7DR9UWlZITKw-gOAw.jpg?auto=webp&s=71b674b64cfc2fdd2705fc4ceba51901ab0eb7b0)
Haven't seen a lot of examples of boards that implement the GA-FC, so here's the one I just put together! (Also posted in r/guitarpedals) : r/BossKatana
NEW BOSS GA-FC EX Foot Controller Enhanced control for the BOSS Katana MkII: - Switch channels & effects easily with new dual-color LEDs - Additional... | By BOSS | Facebook
![Roland altavoz de guitarra GA FC, Pedal de Control, GAFC, controlador de interruptor de pie KTN ACS JC|Equipos de fibra óptica| - AliExpress Roland altavoz de guitarra GA FC, Pedal de Control, GAFC, controlador de interruptor de pie KTN ACS JC|Equipos de fibra óptica| - AliExpress](https://ae01.alicdn.com/kf/Hace8925d3eb5486ea619cf4016dad0b6t/Roland-altavoz-de-guitarra-GA-FC-Pedal-de-Control-GAFC-controlador-de-interruptor-de-pie-KTN.jpg)