Hi PC,

You'll be fine with the M80s in a room that size, because it's big enough to manoevre the M80s into an ideal location for a fine soundstage and smooth deep bass.

If your room were 8 x 10, say, or a den size, then I'd suggest a pair of bookshelf speakers--M3s or M22s--with a sub as an option, because it's much easier to ideally place a pair of compact speakers for a great soundstage in a small room than it is to locate a big pair of floorstanders with limited options in terms of movement.

Regards,
Alan
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Alan Lofft,
Axiom Resident Expert