In Reply to: Altec 604, 604B differences. posted by Coner on June 11, 2020 at 10:39:09:
Hi,
voicecoil length of 604B is 10.7mm instead 9.3mm on the later variants. I don't know about the older 20 Ohm 604 geometry.
604 was (usually) rated 20 Ohms, 604B is 16 Ohms, latter has around 10 Ohms DCR.
604 has a visible star structure on the drivers back cover.
Paper edges on both.
hope this helps,
Anton
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Follow Ups
- RE: Altec 604, 604B differences. - lk4330 23:52:33 01/05/22 (0)