How many versions of Magnepan SMG exist?

Viridian is right, this would be a bad idea.

You can add the SMG-c to the list as well. The original SMG version was a bit larger and heavier looking than its successors. I believe that the "a,b and c" versions were quite similar in size all being not as wide as the SMG but I could be wrong. If size is really an issue possibly a solution is a new or used pair of MMG's as I think their width may be as much as 4 inches less than the SMG on hand at present. Get out the tape measure and check Magnepan's website for the MMG measurements - maybe it will work.

I was well aware of the effects of cancellation, but assumed that perhaps since later versions are not as wide, Winey determined that reducing the width of the wings would not degrade the performance that much. Or were other changes made to later versions to compensate?

Perhaps we can work out an arrangement by which the wings can be hinged back out of the way when not needed. My son got such a good deal on the pair, I doubt he will be interested in letting them go at this point.

I appreciate all of the responses.
Jim

You may find that the later narower versions are designed to be used exclusivly with a sub.