Did you happen to listen to the M12 while you were there? I read the review on Soundstage that likens them to the Altec 19. I wonder if the M12 sound is similar to the M15, with perhaps the M15 sounding "bigger" due to the 15" woofer.
The Soundstage review indicated that the M12 was detailed, and avoided the "honk" typically associated with horn systems. One thing is for sure, no dynamic speaker (of reasonable cost and size) can compete with the sheer dynamics and realistic presentation of a horn system. Finding one that's reasonably priced and smaller in size isn't easy though! The M12 and M15 seem to fit that bill.
The Soundstage review indicated that the M12 was detailed, and avoided the "honk" typically associated with horn systems. One thing is for sure, no dynamic speaker (of reasonable cost and size) can compete with the sheer dynamics and realistic presentation of a horn system. Finding one that's reasonably priced and smaller in size isn't easy though! The M12 and M15 seem to fit that bill.