I noticed a similar phenomena to what Nrchy is relating when I experimented with those Mapleshade brass weights on top of my transport. Too many of them or too heavy, deadened the sound. I'm guessing the same might happen with dampening strips.
Where to put damping sheets?
I've applied some strips of damping to my Music Hall CD-25, but wondering where else would be good to put some. see pic
http://www.brianmedia.net/images/mhcd25-open.jpg
i also lined the inside of the top of the case with sheets, 12"x10"
http://www.brianmedia.net/images/mhcd25-open.jpg
i also lined the inside of the top of the case with sheets, 12"x10"