so i just got my svt 810e a couple weeks ago. i love how it sounds. however i have a problem with it. i have an mia jazz, svp pro, and qsc rmx 850 that i run briged into the cab. at practice when i play the 13th fret on my e string, a couple of the speakers "buzz" real bad. then when we played a show last week, all of them kept doing it on most notes. now i got rid of my peavey tvx 810 for my ampeg, because the ampeg is rated at twice the power. but the peavey didn't do this, and the ampeg does. is this a recurrent ampeg problem with the svt 810e? or is this just a problem with the one i got? i'm taking it back to the dealer, but i wanted to hear your take on this. let me know. thanks. also...i wanted to upgrade my power amp to the rmx 1450 for the extra headroom. is this going to be a problem?