I removed the back cover and cleaned the set out two days ago. Fortunately, almost all of the dust came off very easily with some canned air. I also examined the speakers, as I was curious of their build quality. The front speakers have large rectangular magnets, and the tweeters are real tweeters with magnets, not piezos. What really surprised me is that the 4" subwoofer in the back is a dual voice coil driver! The cabinet for the woofer is pretty neat, similarly designed to the special form-fitted speaker cabinets used in automobile doors. All drivers (save the tweeters, of course) have rubber surrounds, as well.
There is a piece of tape affixed to the top right corner of the CRT bell where it looks like a magnet may have been attached, but it's not there now and I couldn't find it anywhere in the cabinet. Just for $hits and grins (
) I removed all the speaker drivers and placed them near the screen while displaying a blue background, to see if there would be any distortion. None at all. So I'm guessing the speakers are not to blame for the color problems.
One other thing I found: I noticed a small dirt spot on the screen while playing a game on the TV last night. Upon rubbing at it with my finger to get rid of it, I discovered that it wasn't dirt, but rather a very tiny air bubble embedded inside the glass face of the CRT.
It seems that it was either missed during quality control, or Sony thought it too minor of a problem to justify destroying the CRT. (whew!) In any case, unless you're viewing a solid screen color, you have to be right on top of the bubble to see it; it's less than a millimeter wide. It's not bothering me.