I don't know if this is a DIY topic or not, but here it goes.

I'm searching for surround speakers in my theater and have a limited depth of roughly 6 inches as they must be hidden behind fabrics.

I got this crazy idea to get a LSR and make my own enclosure thus making it much more shallow but taller and wider as a closed box. I know this will affect bass, but I will high.pass at 80hz anyway. Of course it requires that I can re-use the front as the waveguide is part of this.

Is this something that has been done or thought of? They are not very expensive so I am thinking of buying one and trying it out - but if I can have some experiences or inputs before, it would be good.