Audio Aero Cap 11 owners, cheap tweak

Someone mentioned to me that he had heard some Cap 11 owners use a piece of black cardboard and lay in on top of the transparent CD transport lid, blocking out light to the transport. I gave it a shot, cheap tweak and all that, and was surprised to notice the bass frequencies really shore up; almost like adding a sub woofer. It's not subtle, that's for sure. I need to re-position my speakers; it's that much different.

Brimac