Altec 421A speaker specs

[jumpin]

I need the specs on the Altec 421A driver i.e. Fs, Qts & Vas. Can anyone help?

[Earl K]

Hi Jumpin

I've never seen those Ts specs posted anywhere for that specific vintage. You can get "some Altec Speaker Ts specs" (http://nleinternet.net/alteclansingunofficial/Thiele-Small.html) over at Todd W.s' "Unofficial Altec Website" (http://nleinternet.net/alteclansingunofficial/index.html) . You could use the 421-8H as a standin for most of the parameters needed in enclosure tuning.
There's a 421a Cut Sheet (http://www.lansingheritage.org/html/altec/specs/components/421a.htm) in this sites Altec Library section. (http://www.lansingheritage.org/html/altec/specs/altec-specs.htm)

regards <. Earl K