Im about to get a SWR Grand Prix rack mount pre-amp and want to know if/how i can use it with the power amp section of my Peavey T-Max head? I love the tube half of the t-max but wish the clean were cleaner and tighter - hence the SWR. Also, how would i hook up a power amp to the t-max? is this bi-amping?!?!? Educate me!!!