I heard the Beveridge speakers and amps (it was a complete system) in the late 70's.  I was sitting in the sweet spot when an audiophile LP was playing.  It was someone playing a xylophone.  The sound was so real I could smell the wood.  The big problem with Beveridge's, besides their size and price, was that the sweet spot was literally one person wide.  If you were in it, everything sounded perfect.  If you weren't, everything sounded strange.