Ok, I have a GK 700RB head and 2 swr 4x8 cabs. I find that with one, my sound is great, clear and punchy and even. I figured adding another would just give me more of a good thing, but I find that even though it gives me more volume, the sound isn't as even from note to note, especially in the high register. My head is 350 watts; is that not enough power or might it be something else? The volume itself is fine so I'm not sure.