gremlin (noun) informal
an imaginary mischievous sprite regarded as responsible for an unexplained problem or fault, especially a mechanical or electronic one.
90% loss of one speaker volume.
I accidentally hit my Ohm 5 mk2 speakers with a 1 second high volume burst. One speaker has an 90% volume loss. I confirmed not my amp or cables by hooking up to second speaker that outputs fine. Fix or repair possible ? Cost?