Since the discussion revolves around dynamics.
I'll just mention that the Sheffield Labs Drum Track XRCD is a good way to compare speakers for dynamics. Horns or no horns it takes considerable engineering/technology to play these drum tracks cleanly (no audible distortion) with brief but sustained levels over 110 db SPL at the listener, as measured with a Radio Shack meter on C weighted.
I'll just mention that the Sheffield Labs Drum Track XRCD is a good way to compare speakers for dynamics. Horns or no horns it takes considerable engineering/technology to play these drum tracks cleanly (no audible distortion) with brief but sustained levels over 110 db SPL at the listener, as measured with a Radio Shack meter on C weighted.