After giving a lot of thought to bi amping the SR6500 speakers, I think I would rather upgrade the amp and just supply more power and keep the 4 speaker system I have. I just do not want to have to squeeze another amp into to truck to bi amp the SR6500's in the front, and keep the DB6500's for fill in the rear. I have one amp for the subs under one seat and the 4 channel under the other. Right now I have 70x4, and I was hoping for 100x4. But the size amp I would like is the Alpine PDX series. The 100x4 is not out, but the 150x4 is and is within my budget. I know this is enough to destroy these speaks, but with the crossover protection for the Tweets, I feel the Max sound levels I listen to will keep them well under a safe level. Am I wrong in taking this approach?