Check replacement fuse types as to whether correct amp rating. Check lead connections (top and bottom on the tweeters). Check the crossover connections to the speakers are tight. Are you connecting the speakers correctly for bi-amp useage. Try alternate sources for problem replication. Finally, try running speakers in non-biamped mode at louder levels to see if the problem is removed.
Magnepan Mg3.6 tweeters and fuses
I have MG 3.6rs and am blowing tweeter fuses. I am biamping with two Acoustat TNT 200 watt amps. I'm in the process of auditioning new amps for my speakers and have had the Classe Cam 350 monos in my system. It doesn't seem to matter what I use, on certain cd cuts the fuses blow. Harry Pearson says you can dump unlimited power into these speakers, and Magnepan apparently biamps with a pair of Bryston 7B monos, yet no one mentions this problem. My room is 11 by 25 so it is not too large for my speakers. I really don't listen that loud, but I do like music, rock, classic, jazz with high dynamics. My room has been treated with sonex. Please advise.