Was listening to my system this afternoon and something was off. Image wasn’t lock in and bass was sounding a little muddy and over powering. Decided to remeasure speaker placement and the right speaker had moved a half of an inch closer to the front wall from where it was placed last time I had them dialed in. I also had blue tape on back and outside of each speaker marking the dialed in position, and the right speaker was covering up the tape.
Either someone broke into my house and moved my speaker or my right speaker shifted a whole half of an inch away from my listening position on its own. Hard to believe spiked speakers can move around that much from vibrations, on a carpeted floor over concrete.
Once I moved the right speaker back into position and reprimanded it, the system returned to its former glory.

