hi, i just picked up a Sunn model T 100/25 amp head. I'm using it with a marshall cabinet (4x12) at 16 ohms. anyone have any suggestions as to which setting combinations (presence, tone, etc) for some cool sounds? also, the cabinet is rated for 280 watts but when i put the sunn at 5, it was sooooo loud! can just that one cabinet take all of sunn's power? or do i need to do two cabs for the head?