A:AnswerThe whole thing. All pieces are labeled (A, B, C, etc) and instructions are really easy to follow.
Husband and I were very extremely pleased with the quality and color (shade of rich taupe).
Great brand of furniture.
Hope this helps...
A:AnswerYou can't mount it to the stand how it is setup but if your stand is going against a wall you can mount the TV on the wall and hold all the components in the stand.
A:AnswerI have a pioneer elite SC-LX501 inside the bottom left cabinet, with a shelf on top to store extra 3D glasses, and misc things. While the receiver does run a tad warm, it fits and is properly ventilated. So no complaints here