Congrats--you've got some very nice Altecs! What will you be using them for? Here's what I could find....
http://altecpro.com/pdfs/vintage/SpeakerAndMics/speakers/417-8H%20LF%20Speaker.pdf
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Type: Posts; User: voice of theatr; Keyword(s):
Congrats--you've got some very nice Altecs! What will you be using them for? Here's what I could find....
http://altecpro.com/pdfs/vintage/SpeakerAndMics/speakers/417-8H%20LF%20Speaker.pdf
...