I was joking up the ST-70 today, and I was kind of in a hurry. I forgot to connect the input RCAs, and a few seconds after startup, I could smell a funky odor. Electric, but more like a motor smell. Turns out it was the tweeter on my left channel. I shut it down and blew on the tweeter to cool the diaphragm. It's a planar. Connected the input RCA and the tweeter seems to be fine and whatever caused the issue is gone. Is there an oscillation or something that can damage tweeters with no input?
Thanks!
Blair