Does carpet deaden the sound too much?

In my fifty years of pursuing the high end, no. In general, you want the two speakers to integrate the sound. Reflections from the wall and floor create slightly different arrival times confusing the sound. Anything that causes multiple arrival times of the same sound can be really detrimental.

I have never experienced good sound in rooms with uncovered floors or glass behind them. Planar speakers can be helped with some reflectivity behind, but not glass, maybe painted walls… not sure of why.

Use spikes for the speakers.  Make sure they rest on a hard surface.

No, carpets are fine, the total room balance matters. 

@holmz - he's asking if too much absorption is a possible reason for the system not sounding lively.

I say, very unlikely that this singularly would be the culprit

^Agree.^

We have no info the speakers, and we have no info on the rest of the room.

However if the speakers are spraying a lot of sound towards the floor, then it is possible.

I am sure a measurement would help.

i have my 4 bose 901 series 2 hanging from the ceiling. i have carpet in the room. doe's the carpet matter??

Does the carpet affect the overall sound (matter)?
I expect it does affect the overall sound, as others have shared.

In a positive or negative manner, well that's for you to determine.