Planar Speaker Asylum

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Planar Speaker Asylum

RE: Determining the age of the Quad ESL

72.219.87.26

In Reply to: RE: Determining the age of the Quad ESL posted by Terry on May 31, 2020 at 13:29:10

I read that about 55,000 pairs were made so yours must be one of the last, which would date them to the early eighties. Even though young in ESL production life terms they are still old. My pair are in the 52,000s, so relatively 'young', but benefited hugely from a rebuild.

Regards,
13DoW

Follow Ups:

Duke or anyone - Story 04:52:23 06/01/20 (2)
my pair are very early but there is no # anywhere visible. I made an update to the xover/tranny many years ago from QS&D in Virginia(?) but that's all I can remember about that except it's possibly the 1st update available.

*Freudian slumber, plenty of sound
- RE: Duke or anyone - 13th Duke of Wymbourne 12:27:36 06/02/20 (1)
  The serial numbers should be stamped on to a plate affixed to the back grills. If you don't have those plates then there was a cross-over change changed made at one point in production - but if you don't have stock cross overs then you may not be able to tell if you are BC or AD (unless that was the mod that QS&D made). Have a look at Gary Jacobson's site that Kent linked in his reply, there is a lot of info there. And if your panels have never been rebuilt I recommend dropping Kent a line.
  
  Regards
  13DoW
  - ah yes - Story 14:07:21 06/02/20 (0)
    the back grills are long gone. The replacement back grills I had ordered years ago were different later ones. The transformers were updated by me with the factory instructions, also long ago.
    
    Bass panels were not damaged (I also have 2 extra's) and treble panels replaced with 2 from QS&D.
    
    oh well, guess I'll never know except that they are early production and still quite alive & well, and oh so good.
    
    Cheers!
    
    *Freudian slumber, plenty of sound

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