When that sort of stuff happens to me (and it does happen on occasion), I check all the connections for that channel. I'll rapidly twist the volume control. I'll rapidly twist my integrated's input selector. I'll lift the tubes up and down in their sockets. Nine times out of ten, one of these things'll cure the problem. More often than not it'll make the system sound better, as well. Sometimes connections just get grungy.
Strange thing happened ...
I put on a record this morning and felt something was off and later realized the soundstage shifted left (between center and left speaker). Putting my ears against the speakers, I could hear sound from both but couldn't make out the difference in levels. Moving back to my listening position, soundstage was still tilted left. I changed the source (Streaming) and the soundstage was back to normal.
Back to TT source, I swapped the input cables at the amp, the image moves right. Swapped the cables between Phono and SUT, image shifted to the right. Swapped the cables from TT to SUT the image again shifted right. Now it was conclusive that it was the TT.
Now I pulled the cart.leads and I felt the right channel +ve clip was loose. I crimped the clip a little and pushed it back on to the cart. Pin.
Put on a record and voila everything snapped back into the center.
Not sure what caused the clips to loosen. Just wanted to share my experience.
Back to TT source, I swapped the input cables at the amp, the image moves right. Swapped the cables between Phono and SUT, image shifted to the right. Swapped the cables from TT to SUT the image again shifted right. Now it was conclusive that it was the TT.
Now I pulled the cart.leads and I felt the right channel +ve clip was loose. I crimped the clip a little and pushed it back on to the cart. Pin.
Put on a record and voila everything snapped back into the center.
Not sure what caused the clips to loosen. Just wanted to share my experience.