Haven't heard anything about an M22 in-cabinet but it would certainly seem to be an obvious addition to the M60/80 in cabs knowing how popular the M22's are. I don't think the rear port has anything to do with it, Axiom would work around it like they did with the towers, just redesign the port(s) to the front. Don't forget, the regular M60/80's are both front AND rear ported, for the in cabs they redesigned them with a much larger front port only.

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