I have been trying out a pair of Linn Espeks for a few days. I have them passively bi-amped with 2 Parasound 1205's. Last night, while showing the speakers off to some friends, listening to Jethro Tull at fairly high (but not extremely high) volume, I noticed two brief flickers of light from the left tweeter. I just happened to be admiring the left speaker at the time for some reason. The tweeter is now silent. What is the most likely cause of a blown tweeter? I'm hoping it's a speaker fault and not from my amps or wiring. Thanks.