Alnico 18" JBL

[Gary Wolf]

Did JBL ever produce a alnico 18" bass driver? What series would it have come from? when was the earliest 18" produced?

[yggdrasil]

I'm not sure if K151 was the first, but here it is: http://www.lansingheritage.org/html/...p/k-series.htm

[Gary Wolf]

I may have answered my own question with a look in some old literature.
The K151 is a very deep coned 18" that appears to have a alnico magnetic assembly. It was listed for bass and organ along with the K145 and other alnico JBL woofers. this info from publication PC/76-2.

publication MIB 12/82 lists the E 155 but it is hard to tell if it is a ferite or a Alnico version. The dimensions seem to indicate that it is still alnico even though other speakers in this grouping have all switched to ferite.

[alskinner]

Gary

The K151 was an alnico 18" woofer.

http://www.jblpro.com/pub/obsolete/k_series.pdf

AL

[yggdrasil]

E-series is ferrite.

http://www.jblpro.com/pages/obsolete.htm

http://www.jblpro.com/pub/components/eseries.pdf

[edgewound]

Hey Gary...

Thanks for putting your location with your avatar . My late father was born in Great Falls.

As the other guys said, and you confirmed, the K151 was the first and last alnico 18"...the E155 and all E-series drivers are ferrite.

[Gary Wolf]

The bottom speaker in my avatar is a JBL 18" I am curious to look and see which one it is? the origional 18 was a electrovoice EV 18W. I just remember my neighbor replaced it with a JBL before he died in the 80's.

[paragon]

Great lookin old (alnico) driver ! Lucky men !

[northwood]

looks brand new