Can anybody think of anything that could have happened.
Umm, yah, you moved.
New room, new acoustics.
I highly doubt anything is wrong with your speakers as it seems you've checked for loose wires and such.
Assuming the Paradigms still sound the same in a different room while the M60s sound different could easily be a psychological perception.
Audio memory is incredibly short.
We moved to a new home from our old place. The Axioms sounded great on our main floor. The main floor we have now doesn't sound good for anything i've put there.
Lesson learned.
Rooms make up a huge percent of the audio difference.
