Xref: utzoo sci.electronics:3518 rec.audio:7603
Path: utzoo!attcan!uunet!wucs1!wucs2!jps
From: jps@wucs2.UUCP (James Sterbenz)
Newsgroups: sci.electronics,rec.audio
Subject: reconing speakers
Keywords: loudspeaker
Message-ID: <904@wucs2.UUCP>
Date: 1 Aug 88 17:41:26 GMT
Organization: Washington University, St. Louis
Lines: 36

I'm not sure about posting this to sci.electronics, but there isn't
a sci.electroacoustics :-), and I thought I might reach some of those
who don't read "wreck.audio"

I've got a pair of Electro-Voice EV14-A speakers, purchased in 1974.
The woofers are 10" acoustic suspension type, and the ring of foam
which supports the paper cone has deteriorated very badly (i.e. holes).
The cone itself seems fine.

I called E-V, and they sent me a replacement pair of woofers, pure
junk.  These sound far worse, than with the old ones (with holes).  They are
poorly constructed, have a magnet that must be measured in grams :-),
and are made in Taiwan.

I talked to a technical type at E-V, who said that E-V hadn't made any
acoustic suspension speakers in 12 years, they just stocked something
to send to people who ordered replacements (after all, I didn't ask
for a QUALITY replacement (my words, not his :-).

So two questions: Has anyone had experience with rebuilding speaker
cones.  I'm more interested in finding out if I should try to find
someone who can do it, rather than trying it myself (although it 
may be fairly simple since its only the foam that is in bad shape.

Any suggestions for a good 10" woofer that would be compatible with 
the EV14-A.  It's a 2-way, but I don't remember the crossover frequency
offhand.  How critical is the enclosure geometry in acoustic suspension
systems?

 
     
-- 
James Sterbenz  Computer and Communications Research Center
                Washington University in St. Louis 314-726-4203
INTERNET:       jps@wucs1.wustl.edu
UUCP:           wucs1!jps@uunet.uu.net