Channel Seperation Issues

Are the speakers themselves out of phase--as opposed to phase-reversed? Swap leads on just one speaker--have you done that? Find a mono cd or lp and see if it's centered. What's NEW in your system? If it's ALL new, (ie new to you) then no help, but if you installed a new piece, take it out and put the old one back in. Play just one speaker at a time--I would think a loose tube or bad tube would do more than mess up the localization...it should sound crappy on its own. Does the cd player have a headphone output that you could use to bypass the preamp and test it that way? Good luck finding it!

The only thing that comes to mind is where the xover point is for the side mounted woofers for the Audio Physics. If the point is too high, the side mounted drivers may be diffusing the upper bass therefore mixing the left and right somewhat. I would make sure the speakers are far from the side walls and perhaps toe them in to where you can't see the sides of the cabinets from your listening position. I would also try to get them as far apart as possible without getting too close to the side walls. My speakers are about ten feet apart but toeing them in gives me plenty of center fill. I do not have the same brand speaker as you so you may have different results.

Many thanks again Rwwear and Tarsando for your time!
Swapping leads on just one speaker is interesting, I hadn't considered that. No headphone jack on the CD or anywhere else, unfortunately, but I'll try the one speaker lead switch. The Pre is new, but I swapped it out already and the problem contiued.

If any other great minds out there have an idea or hunch, please let me know!!!

When did the problem START????? I mean, was everything fine for a few months or years and then all of a sudden...? Keep swapping! Put some old speakers in place of your current ones, etc. If the system used to be fine in the location it is now, you ought to be able to narrow it down. If the preamp isn't it, ...you say you have swapped all over the place. When I do this I have to constantly remember what I have done and why before I move on to the next swap. Also try to find some totally unambiguously "stereo sounding" cd...an old jazz cd where the sax is on the left and the piano on the right...is something like that mushed together? Continued good luck and be sure to post the solution when you find it! Regards, Tom.