I don't know how it would work in the proper (vertical) orientation - maybe great - but I wouldn't recommend just laying a M22 on its side and using it. I've read - perhaps in something Alan wrote, actually - that positioning speakers on their side when they are not designed for that can screw up the way the sound is heard (something about a problem with the axis).

I've read about using 5 such speakers for surround sound music (L,R,C,SL,SR), but they were all normally oriented.

---- A Woofer in Tweeter's Clothing... M60s, VP150, QS8s, EP350 Onkyo TX-SR702, Denon DVD-3910