Altec A7s need to be in 8-10,000 ft3 room minimum, otherwise the 2K bump will drive you crazy, likewise they really are at their best with a tube amp. Those big 515 woofers kick back a lot of EMF that most solid state amps weren't designed to handle. That back EMF can trigger current limiting, or leak into the feedback loop, neither of which helps sound quality.
But, in their place, and with a proper amp, their dynamics and clarity will amaze you.
But, in their place, and with a proper amp, their dynamics and clarity will amaze you.