Yes, many of the cinema (movie house) speakers were loaded by a huge horn. This matches the radiation resistance of the speaker cone to the radiation resistance of air and produced an effortless expansive sound that you only normally expect from a live concert.
A friend pretty much rebuilt an old inn and, without his missuses knowledge, incorporated a huge masonry horn in the chimney breast/stack. He uses it as the bass sub for his audio system, which is also on a grand scale.
It is a good job he lives in the country with no near neighbors.
spec