miscellaneous vintage driver pairs

el seven · 27th February 2011, 08:05 AM

Looking for some technical assistance identifying these drivers.

Many pairs, from 3" to 12" actually.

For example... 5.25 open back.

el seven · 27th February 2011, 08:08 AM

And they are all for sale so if something perks your interest, please speak up!

Old Altecs? Fostex?

el seven · 27th February 2011, 08:13 AM

Altec 421 prototype 16" soundstage driver?

el seven · 27th February 2011, 08:16 AM

I will be posting more when i take some additional pictures.

gfederys · 27th February 2011, 11:47 AM

EPI INVERTED DOME TWEETERS-PAIR-OHM TESTED-for M SERIES - eBay (item 290530641962 end time Mar-05-11 17:28:50 PST)

Ohighway · 28th February 2011, 09:29 AM

I believe the 5.25 open back might be CTS drivers. At least the 137 code would suggest it.

More Codes

planet10 · 28th February 2011, 10:06 AM

The CTS drivers in post 1 probably came out of an EPI microTower (a certainty if related to the EPI tweeters in post 2). The JBLs in post 3 came in a number of variations. All the ones i've had thru here needed new surrounds.

dave

el seven · 1st March 2011, 09:24 PM

Quote:

Originally Posted by planet10

The CTS drivers in post 1 probably came out of an EPI microTower (a certainty if related to the EPI tweeters in post 2). The JBLs in post 3 came in a number of variations. All the ones i've had thru here needed new surrounds.

dave

Thanks dave! 3rd post i'm most certain is an Altec 421. I have another just like it but it has the white frame they used in mass production units.

Here's a massive mid-tweet. Massive motor / magnet structure.

planet10 · 1st March 2011, 10:51 PM

From the EIA number those are Jensens.

dave

27th February 2011, 11:47 AM	#5
gfederys diyAudio Member Join Date: Feb 2008 Location: Detroit	Do I win? EPI INVERTED DOME TWEETERS-PAIR-OHM TESTED-for M SERIES - eBay (item 290530641962 end time Mar-05-11 17:28:50 PST)

28th February 2011, 10:06 AM	#7
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	The CTS drivers in post 1 probably came out of an EPI microTower (a certainty if related to the EPI tweeters in post 2). The JBLs in post 3 came in a number of variations. All the ones i've had thru here needed new surrounds. dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

1st March 2011, 10:51 PM	#9
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	From the EIA number those are Jensens. dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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27th February 2011, 08:16 AM	#4
el seven diyAudio Member Join Date: Jul 2009	I will be posting more when i take some additional pictures.

28th February 2011, 09:29 AM	#6
Ohighway diyAudio Member Join Date: Sep 2008 Location: In the woods..... in Howard County, Maryland.	I believe the 5.25 open back might be CTS drivers. At least the 137 code would suggest it. More Codes

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