Can anyone tell me where the progress in audio went?

@kingdeezie 

Well, I’m glad you’re not alone on this one. Good luck with the audio venture.

Progress can only be measured objectively, not subjectively. That’s just the way it is.   

theaudioamp

Who is to say what is objective and what is not?  

Not field coil speaker rated, but one of the best videos/sound I've heard on YT (in regard to a vintage horn speaker) may have been done by "johnk" who has posted in this thread.

I think it was an RCA design (not Western Electric) and I'm not certain if it was a rebuild or a reproduction.

Been searching for the video for a few years without any luck.

The speaker/horn looked like an early WE design, but again I think/recall that it was of RCA manufacture.

Audioamp:

I know nothing of the design of the speaker/video I posted, but I do see gaps on the back sides of the horn.

They do not look even/symmetrical to me, but this may be due to the camera angle(s).

DeKay 

dekay

I believe you're thinking about RCA  LC-9A