I have had my current setup for a while now and have had no issues until recently. The last few weeks I have been experiencing an issue with one of my M80s. When watching a blu ray the left speaker with produce a thump and then stop working. It does not seem to matter if the sound track is demanding or calm, it seems totally random. It only seems to happen with movies, I can play CDs, MP3s, Xbox and PS3 games though the same system with no issues. Nothing else goes into protection, the AVR and my amps still show they are functioning and all other channels work fine. Any idea where to start? Thanks ahead of time for any help


85" Class QN90A Samsung Neo QLED 4K
M80s-EP500-VP150-QS8s
Denon AVR-X4700H
Emotiva XPA-2
Emotiva XPA-5