Channel Seperation Issues

I dont have that test cd, but I imagine a channel id track is meant to do just that. In the old SP cd they had a dog barking out of one channel then the other. WRT a previous answer that bass should be equal out of both channels...it depends on the frequency. I do believe an electric bass or even an upright bass can be localized in one channel or the other...based on the overtones. Plus if the bass was recorded in just one channel...there is no way it would come out equally in both channels. So is everything but the bass divided right/left? Or is it just bass notes that are being played? Is there a mono switch somewhere?

Does it just sound like both or does one woofer vibrate and the other doesn't?

In answer to Rwwear, the bass line is played by a Fender 4 string bass guitar with plenty of lower midrange to localize the sound. I believe, at least.

To Tarsando. Everything else is not divided properly. I spent the afternoon fiddeling around more. Changed speaker cables completely to some very short 3' oldies I had lying around, and playing music to see if I could narrow down the issue. On Dark Side of the Moon there are footsteps running from left to right and back again very clearly, I could not localize them properly. On Led Zepplin's Whole Lotta Love, there is similar swirling around between left and right in the mix, and that is not localized well either. On tracks with a single singer, the person is centered up fine, sound stage is apropriatly deep and or wide as the mix dictates.
Interesting thought on the mono switch, but no dice. At least not to my knowledge. Although I could see myself making that type of mistake! The amps bias up well. Everything else SEEMS to be in order, but I can't kick the problem.
Could I be starting to lose a driver or input tube in the right mono-block? Would the beginings of that cause a problem such as this? I need some solid Tube Afficianado advice perhaps.

Thanks very much to Rwwear and Tarsando for posting in, I very much appreciate your thoughts and time. Any other ideas from you or anyone else would be MIGHTILY appreciated.

NGjockey-

All drivers seem to be working.

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!