I've blown 4 sets of tweeters in the last 3 weeks and was wondering if anybody had any ideas. I am currently running all Polk Momo, a 400.4 with two sets of 6500's components. Ran them for a good two months hard and no problems. Then all of a sudden the tweeters went out of 3 of them one weekend. Replace one set with 650 coaxials, and one day out and popped them tweeters along with the last one from the 6500's. This past weekend put a set of 6x9's and played on the conservative side, and you guess it poped them tweeters. I'm about ready to just go to wal-mart and buy Sony explodes and keep taking them back if this going to keep going on. Any help would be great.