Only a year late to the thread, but Rockports need some room to breathe, don’t they? I heard the Altairs at the Sound Environment in Omaha, NE, and they were driven by a set of beautiful D’agostino pre and power amp. Speaker cables were transparent -- they were huge cables w/some big boxes integrated into them.
Anyway, the Rockports were a good 6’ off the back wall and likely an equal distance from the side walls in the listening room. They sounded glorious and ruined me for life. They were humongous, but they simply disappeared listening to them. Vanished. Soundstage breath and depth was enormous. Very detailed but not fatiguing. I was in lust and needed therapy to get over not being able to take them home (they wouldn’t fit in the overhead compartment on the plane...).