Hello, My son just bought a pair of active humbucker pickups.The output is around 58k ohms..Pots are 2 volume, 1 tone ,3 way switch. Pots are 25k.The problem seems to be when he switches between heavy distortion to a clean mode. There seems to be much distortion in the clean mode.It's not clean enough.He has a Marshall MG100 HDFX head with 412A &B cabinets.Are the pickups just too heavy to play clean or did I miss something in the wiring. I just thought of something, I didn't change the Tone capacitor that I used for the passive pickups. Would it be a different value. Thanks.