A:AnswerYour turntable will fit.
However, if you have a lid on your turnable (on top of the 5"), then it will have to be removed.
I haven't had issues with dust on my turntable after removing it's lid in order to fit it in the cabinet.
A:AnswerThe back panel has slots where one can run wires out to various components outside of the rack i.e. the TV. The unit also has space internally between the back wall and the back edge of each shelf so that one can run connections from one device/shelf to another. Also I do believe the back panel can be removed but I have not needed to do this. Overall I am very glad I purchased this piece. It is not what I would refer to as fine furniture but it very very nice. My girlfriend thought I was just buying more toys and gave me a bit of a look, but she had to admit it was good looking and very practical. I'd buy it all over again.
Don
A:AnswerI don’t know, would call Best Buy perhaps geek squad would to it for added charge. I assembled myself, good instructions. I would recommend a helper if you choose to assemble yourself as it is heavy when you get toward the final.
A:AnswerThe manual states (from bottom shelf to top): 20 lbs, 15 lbs, 15 lbs, 30 lbs. In other words, not much, considering an average AVR/amp tends to be in the 30 lb range.