Hello all. New to all of this and was wondering if I could get some advice. I currently have a 5.1 setup like the attached image (excuse my rudimentary Paint skills). The surrounds are in-ceiling speakers set about 2 feet behind the listening position and about 10 - 12 feet apart. My receiver supports a 7.1 set up. Would it sound ok if I installed 2 rear in-ceiling speakers? Because of the back wall, the rear speakers would only be about a foot behind the surrounds.
I hope I'm describing this correctly, and thanks very much in advance for any advice you ccan give.

I hope I'm describing this correctly, and thanks very much in advance for any advice you ccan give.
