I use a bongo 5, which i run through a GK1001RB-II and a Labsystems 1x15 cab(its a local brand). the cab is rated at 400W@8 ohms, and the GK is rated around 460W@8 ohms. basically, when i dig in hard the cab farts. but i'm not sure if its the cab or if the input stage is clipping on the GK when i dig in hard. my question is; how am i supposed to balance the input and master volumes to ensure the cleanest possible sound?