Have you tried emailing Ron at Martin Logan? He might have an idea or be able to get advice from someone else thereI really can't wrap my head around what is wrong.
After it came alive for over minute, I unplugged it over night and carefully vacuumed it.
I have vacuumed plenty of times & washed it. So when it come to life the other night it sounded fantastic, then it died haha.
I have resolder over connection that looked different from the rest.
What else is there to do? If the mylar is okay, what can cause this kind of problem?