I learned that "D" stands for Diamond and the D series has some type of diamond tweeter. The 800d's were driven by a Classe' 200 wpc amp with an Audio Research preamp and CD player.

Needless to say the system sounded good. It did have some short comings though. The midbass seemed to be congested or tubby with complex pieces. This could be attributed to the room or a tube preamp as much as a flaw in the speaker. The 800d's played very low. When playing the bass solo intro on a Gordian Knot CD and fixtures in the room began to vibrate. The highs were quite prominent. I didn't get a sense this would be fatiguing over time but I only listened for around 30 minutes. The 800d seemed to have a nice midrange and sound stage. I have to admit this speaker is the best sounding B&W I've heard but for $20k I believe there are better at that price. I think the Dynaudio Confidence series would offer better performance for less money.