I'm currently running a Kustom deep end 300 with a GK 412 cab.. I'm getting overwhelmed by my guitarists. They're both running full 8x12 stacks.... blasting me out of the water... I need some advice on what I can do to get the soul shattering lows and clean mids and highs that cut through the mix that I desire... at lower volumes, my rig does fine... but I'm having to pull the gain up so much and drive the head so hard that I'm basically running with full on overdrive and my sound is muddy as hell... I'm playing on a Gibby T-bird so I know its not the instrument's fault... I just want a good clean sound with a measure of warmth and plenty of volume... and low end you can feel... I'm thinking of running a 2x15 cab and adding a power amp... but the 412 I have is a 4ohm, so I'd have to replace the speakers... right? I'd hate to change anything about my 412.. its vintage and as far as I can tell the speakers are original and in really good shape... its a beauty of a cab sonically... so any other suggestions?