romeo,

Sure. My sub is at the end of my couch as a quasi-end table. Sound quality will be unaffected. Of course, once you get a sub, you may find that the bass is too strong if you place it in the corner. That's where you will get the greatest enhancement of deep bass from the intersecting walls and floor. But you can move it along one wall or the other away from the corner to reduce the bass output if it sounds too boomy.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)