LOUDSPEAKERS A Visual Hi-Fi History 1870 - 2008

Cool poster of HiFi history. They left out a few though... LOL
  

I don't have a larger version of this.
EDIT 
But everyone else knew about this site.
You can order HiFi posters from http://hi-fi-posters.com/ 
Thanks for the heads up Peter and Joe.


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Early Lansing Factory

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1938 RCA Radiotrons Ad