Hi everyone:
Well, I took my Mazda in this afternoon, and my stereo problem is now history!
Although he had no info from Mazda, my service manager went ahead and ordered a replacement radio for me a week or two ago. He showed the new radio to me; it had a March 08 manufacture date and a Mazda badge. When removed the old unit had an 07 manufacture date; I saw it as well.
Unit was replaced in about 30 minutes, (nice clean job, btw), and it clearly solves all the problems.
1. There is no bump from 34-34.
2. The ALC works correctly; it doesn't change the tonal balance.
3. The sound is cleaner, nice tonal balance, with bass throughout, much less distortion.
4. I *think* the radio reception is also improved... but can't say for sure.
I did note, as well, that the volume has to be set to a higher number to reach a given level. In other words, 35 isn't terribly loud, but a reasonable volume. Given that the volume range goes up to 65 this seems more reasonable than on the old unit - where 35 was straining.
I have not played the unit at really loud volumes, but wouldn't anyway, and I suspect it will handle that just fine.
SOoo... put me down as someone without a stereo issue.
What the HECK will I talk about now?!