"American Sound" Speakers

The West Coast Sound (American Sound) was developed as a response to the motion picture industry. Since sound tracks became part of the motion picture industry there was a demand for efficient systems which could fill large theaters with clear, undistorted and dramatic sound. There were no options but the use of large horn loaded systems. JBL, Altec & Stephens were leaders on the west coast. The East Coast Sound was still dominated by British design speakers or USA manufactures attempting to duplicate the British sound.

Viridian Thanks for your endorsement!

Muzikat: IMO, if GMA and North Creek are both musical, it's in pretty different ways. Could be just on my audition, but the EOS was analytical, while my North Creeks have always been rather relaxed. John

Is there a signature frequency response curve to American speakers (now or in the past) in the same way there is for British speakers with the BBC dip?

Muzikat: "IMO, if GMA and North Creek are both musical, it's in pretty different ways. Could be just on my audition, but the EOS was analytical, while my North Creeks have always been rather relaxed. John"

John, What's your point here? Are you trying to debate me on which of these speakers are the most "American Sound" or what? The OP asked for examples of American Sound. I gave him a couple of examples. Everyone has their preferences, like all of audio. You only want to challenge me it seems, but you have not contributed to the OP.
In your opinion which best exemplifies the "American Sound"?