CD Player Tweak

After seeing an episode of Steve Gutenberg, and reading a multitude of experiences on the interweb, I’m planning on trying what might be the most common audio tweak in existence: Lining the inside of my CD player with $20 worth of dynamat. Praise for this tweak seems to be almost unanimous. Better sound for only pennies.

The thinking is that the dynamat deadens vibrations and that less vibrations equals better sound. That line has a certain surface appeal, it seems to make sense. But one question is nagging at me and I’m hoping to get an answer before I break out the screwdriver and void my warranty:

If this is such a good idea, so common sense-ical, and so cheap, why didn’t NAD (or whoever) do it first?