Quad ESL 57’s, or Stax ESL. The Stax supposedly have incredible transparency, perhaps even a little better than the 57’s ( back in the day I owned several 57’s, running single pairs as well as stacked pairs , however never owned the Stax). The Stax are very inefficient and won’t play very loud, but could be a great solution for a 10 x 10 room.
Cheers.....