A:AnswerThis speaker set does not come with a receiver or subwoofer. This question would be better asked regarding the receiver used with the speakers .
A:AnswerYes, the HT-50 center channel will have a single, 1/4-20” threaded insert that you can use to mount the center channel speaker to a wall or stand.
A:AnswerIt would be tricky to find a perfect mount for the center speaker. As you can see on my picture, the back is rounded and the only connection spot is somewhat angled. However I suppose you could just mount a few generic brackets or a shelf for it.
A:AnswerBy swiveling the HT-50 satellite speaker's base, mounting via keyholes is achievable. Use a #10 or #12, 2.5" - 3" panhead wood screws (mount in wall stud or use anchors). The Center channel speaker will feature a 1/4" X 20 threaded insert to attach to a wall mounting bracket.