Or, if you have an extra stereo amp lying around, you can parallel the RCA output from a receiver or pre-pro using a splitter, and use both amplifier channels for the two center speakers.
I'm contemplating one or two M2 for center channel, to go with my M22 mains. I'm also contemplating a third M22 layed on its side. Not a perfect dispersion pattern, but it would give me the opportunity to set it upright in my next HT configuration. This was one recommendation from the Axiom experts when I asked them about center channels.
