Quote Originally Posted by Altec Best View Post
The motor in the one could be a little weaker as well... They are 50 years old.. They could probably both use a re-magnetization. You will never really know until you open them up and check the diaphragm part numbers to confirm.
Although this is quite possible, they are both 1957 production dates and they have been together since new which means they were exposed to the same atmosphere, storage, usage etc.. I would hope that even if a little weak that they are equally weak.. If they came from two different sources I would be more inclined to go along with this theory.

Also given that these are pristine 604c's with original cones in excellent condition they will probably never come back out of my 606 cabinets and definitely will never make any kind of journey in a shipping crate anywhere to get remagnetized. eek: I'd be too afraid of something happening to them. Only way they will ever have the luxury or demagnetization is if I can drive them somewhere myself..

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Quote Originally Posted by cradeldorf View Post
Probably explains why was mine missing after it went to GPA.
If I sent a speaker out with a perfectly fine diaphragm I think I would get the old part back!! especially given the rarity and price of an original fram!