What do I need to do to brighten up my Mark IV? I've dropped the bass all the way down, boosted the treble, and set the midrange on 6. I've pulled the corresponding knobs out to brighten, but still there is too much bottom end. I've tried both of my guitars to see if there was any difference, but still too much bottom end. I'm playing an '06 American Deluxe Strat SSH and a '95 Ibanez RG450 DX. The Strat has the Diamondback Humbucker in the bridge and the Ibanez has a Dimarzio Evolution in the Bridge. I'm also running the hotter tubes (white), but I'm only running on Tweed Power.