Speaker repairs
 

I have a pair of really nice three way Pioneer speakers. They stand
about 3.50 ft. off the floor and use 12 inch woofers. The foam rings
around the circumferance of the cones has rotted away leaving the
paper cone supported only by the center suspension. I've seen on the
Internet and in catalogs foam repair kits. The sellers make the repair
sound so easy but I'm concerned about how you actually center the cone
when you glue, ( I assume) these rings into place. Way back in the
stone age, 1920's speakes used three shims which you stuck down
between the inside of the voice coil and the magnet to center a new
cone which you were installing. This was after you glued your old
voice coil onto the new cone. You then glued the new cone and the
cardboard ring in place. It was a tedious job the say the least. With
these foam jobs, do you have to rip off the center cardboard or felt
disc which protects the voice coil and magnet area to shim the cone
when attaching these new foam rings? If anyone has performed this type
of repair and can share the details of the procedure with me I would
be very grateful. Thanks for any help. Lenny Stein, Barlen Electronics.

Speaker repairs
 

Speaker repairs
 

wrote in message
oups.com...
I have a pair of really nice three way Pioneer speakers. They stand
about 3.50 ft. off the floor and use 12 inch woofers. The foam rings
around the circumferance of the cones has rotted away leaving the
paper cone supported only by the center suspension. I've seen on the
Internet and in catalogs foam repair kits. The sellers make the repair
sound so easy but I'm concerned about how you actually center the cone
when you glue, ( I assume) these rings into place. Way back in the
stone age, 1920's speakes used three shims which you stuck down
between the inside of the voice coil and the magnet to center a new
cone which you were installing. This was after you glued your old
voice coil onto the new cone. You then glued the new cone and the
cardboard ring in place. It was a tedious job the say the least. With
these foam jobs, do you have to rip off the center cardboard or felt
disc which protects the voice coil and magnet area to shim the cone
when attaching these new foam rings? If anyone has performed this type
of repair and can share the details of the procedure with me I would
be very grateful. Thanks for any help. Lenny Stein, Barlen Electronics.

Steps 8 & 9 comprise one generic method, which may be of some help.
But this certainly doesn't apply well to every speaker, so YMMV:

http://www.speakerrepair.com/instructions.html

Speaker repairs
 

Speaker repairs
 

wrote:

I have a pair of really nice three way Pioneer speakers. They stand
about 3.50 ft. off the floor and use 12 inch woofers. The foam rings
around the circumferance of the cones has rotted away leaving the
paper cone supported only by the center suspension. I've seen on the
Internet and in catalogs foam repair kits. The sellers make the repair
sound so easy but I'm concerned about how you actually center the cone
when you glue, ( I assume) these rings into place. Way back in the
stone age, 1920's speakes used three shims which you stuck down
between the inside of the voice coil and the magnet to center a new
cone which you were installing. This was after you glued your old
voice coil onto the new cone. You then glued the new cone and the
cardboard ring in place. It was a tedious job the say the least. With
these foam jobs, do you have to rip off the center cardboard or felt
disc which protects the voice coil and magnet area to shim the cone
when attaching these new foam rings? If anyone has performed this type
of repair and can share the details of the procedure with me I would
be very grateful. Thanks for any help. Lenny Stein, Barlen Electronics.


Not ever speaker is a candidate for refoaming. If you don't use the
shims (and take off and replace the dust cap, you run the risk of off
center rubbing voice coil. also, if ALL the foam is rotted out and the
speaker was run like that, the voice coil former may be warped or bent
now making a refoam a futile effort.

certain cones are more problematic to refoam. The best situation is
paper cones with foam on top. The worst are plastic cones and cones with
the foam stuck to the under side of the cone. Its takes a lot of careful
prep work to scrap all the old foam off the cone and the frame to make a
good surface for the replacement foam to adhere properly. They usually
use a glue like airflex 400 (looks like white elmers glue)

What's a refoamers nightmare? Bose 801's.

Bob

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

Speaker repairs
 

On Feb 1, 5:27 pm, "
wrote:
I have a pair of really nice three way Pioneer speakers....
With
these foam jobs, do you have to rip off the center cardboard or felt
disc which protects the voice coil and magnet area to shim the cone
when attaching these new foam rings? If anyone has performed this type
of repair and can share the details of the procedure with me I would
be very grateful. Thanks for any help. Lenny Stein, Barlen Electronics.

There are a lot of people who claim success refoaming certain types of
woofers (ones with large gaps like Advent or EPI) without shimming the
voice coil. I always shim the VC when refoaming. Cutting away the
dust cap, shimming, and replacing the dust cap is very easy and
quick. Removing the old foam/glue, cleaning the residue, and glueing
in the new foam is very time consuming and tedious. If you skip the
easy part (shimming) you risk having to do the PITA part (replacing
the surround) over again.

If you have not bought the new surrounds yet, check with
wooferrepair.com. They sell surround kits which include an excellent
how-to DVD. If you have never done it before, the instructional DVD
alone is worth the price of the whole kit.

Paul

Speaker repairs
 

"Paul" wrote in message
oups.com...


If you have never done it before, the instructional DVD alone is worth
the price of the whole kit.

It's the most complete kit for the money I've seen so far. Thanks for
posting, RM~

Speaker repairs
 

"Paul" wrote in message
oups.com...

an excellent how-to DVD.

I down loaded it (57mb to a zip disk) last night and watched it. It really
is informative for someone (me) who has not refoamed a speaker before.
It also convinced me that removing the dust cover and shimming the coil
is a real worth while way to go, particularly someone like myself who hasn't
developed the feel for the proper clearance. RM~

Speaker repairs
 

Rob Mills wrote:

I down loaded it (57mb to a zip disk) last night and watched it. It really
is informative for someone (me) who has not refoamed a speaker before.
It also convinced me that removing the dust cover and shimming the coil
is a real worth while way to go, particularly someone like myself who hasn't
developed the feel for the proper clearance. RM~


Thanks for sharing this info. I downloaded the video as well - a good
tutorial!

--
Adrian C

Speaker repairs
 

Speaker repairs/WooferRepair.com
 

"Paul" wrote in message
oups.com...

If you have not bought the new surrounds yet, check with
wooferrepair.com. They sell surround kits which include an excellent
how-to DVD. If you have never done it before, the instructional DVD
alone is worth the price of the whole kit.

I ordered my woofer repair kit via U.S. mail a week ago to day from
WooferRepair. I got the kit today, 7 days later. I figure that's pretty
quick considering I ordered by mail so I could pay by check. Everything
looks great, just as specified at their web site. Now if I can get my part
done. RM~

Speaker repairs/More than you ever wanted to know
 

"Paul" wrote in message
oups.com...
There are a lot of people who claim success refoaming certain types of
woofers (ones with large gaps like Advent or EPI) without shimming the
voice coil. I always shim the VC when refoaming. Cutting away the
dust cap, shimming, and replacing the dust cap is very easy and
quick. Removing the old foam/glue, cleaning the residue, and glueing
in the new foam is very time consuming and tedious. If you skip the
easy part (shimming) you risk having to do the PITA part (replacing
the surround) over again.

If you have not bought the new surrounds yet, check with
wooferrepair.com. They sell surround kits which include an excellent
how-to DVD. If you have never done it before, the instructional DVD
alone is worth the price of the whole kit.
************************************************** ***********************

I did my first set of 10 inch woofers using the wooferrpair.com kit and
everything went great. I got a little anxious on the first one and attached
the surround to the cone after letting the glue set for only 5 min which
kept me very busy pressing out the wrinkles for about 30 min. I waited
10 min on the second one and everything went well, didn't need any
clamping and the joints actually pulled them selves tighter as they dried.

Shimming was a piece of cake with the plastic shims that wooferrepair
supplied. I don't know but suspect that using the paper shims supplied
by some vendors could be a nightmare as it takes a little force to get
them in, might have to soak them in a solution of viagra.

Someone mentioned that they used tacky glue from a crafts store to
attach the surrounds. Out of curiosity I picked up a bottle of Aleens
"original tacky glue" (they have several different types). I tested it and
compared it with the glue supplied with the kit and it has the same
amount of tackiness after drying a few min and even smells the same
(If it looks like a duck, quacks like a duck, it's a duck). I do believe
that in my next woofer repair (I have several more to do) I will use the
$2 surrounds from MAT electronics and tacky glue but highly
recommend wooferrepair.com for the first time. RM~

Speaker repairs/More than you ever wanted to know
 

Rob Mills wrote:
"Paul" wrote in message
oups.com...
There are a lot of people who claim success refoaming certain types of
woofers (ones with large gaps like Advent or EPI) without shimming the
voice coil. I always shim the VC when refoaming. Cutting away the
dust cap, shimming, and replacing the dust cap is very easy and
quick. Removing the old foam/glue, cleaning the residue, and glueing
in the new foam is very time consuming and tedious. If you skip the
easy part (shimming) you risk having to do the PITA part (replacing
the surround) over again.

If you have not bought the new surrounds yet, check with
wooferrepair.com. They sell surround kits which include an excellent
how-to DVD. If you have never done it before, the instructional DVD
alone is worth the price of the whole kit.
************************************************** ***********************

I did my first set of 10 inch woofers using the wooferrpair.com kit and
everything went great. I got a little anxious on the first one and attached
the surround to the cone after letting the glue set for only 5 min which
kept me very busy pressing out the wrinkles for about 30 min. I waited
10 min on the second one and everything went well, didn't need any
clamping and the joints actually pulled them selves tighter as they dried.

Shimming was a piece of cake with the plastic shims that wooferrepair
supplied. I don't know but suspect that using the paper shims supplied
by some vendors could be a nightmare as it takes a little force to get
them in, might have to soak them in a solution of viagra.

Someone mentioned that they used tacky glue from a crafts store to
attach the surrounds. Out of curiosity I picked up a bottle of Aleens
"original tacky glue" (they have several different types). I tested it and
compared it with the glue supplied with the kit and it has the same
amount of tackiness after drying a few min and even smells the same
(If it looks like a duck, quacks like a duck, it's a duck). I do believe
that in my next woofer repair (I have several more to do) I will use the
$2 surrounds from MAT electronics and tacky glue but highly
recommend wooferrepair.com for the first time. RM~

I just bought a kit from a local supplier off eBay. I didn't actually
know that they were local, but used them because they supposedly had a
kit that was specific to my particular woofers. Turned out that it
wasn't; but it was close enough.

The kit came with paper shims, which were kind of a PITA, but not
impossible even for a 1st timer. I expected new dust caps, but instead
I got instructions to slice around the periphery of the caps, then
reglue them. I can't even see the joint; but this obviously wouldn't
work with an aluminum cap.

All in all, the job turned out well; and I'm very pleased with the
effort. The $14.99 thrift-store EPI's sound great!. Do you have a link
to MAT? I have enough glue left to do at least four more 8"ers and shim
stock appeared to be simply card stock. No reason to spend another $25
for the next pair if I can do it for $4.

jak

Speaker repairs/More than you ever wanted to know
 

"jakdedert" wrote in message
...

I got instructions to slice around the periphery of the caps, then reglue
them.

I have seen those instructions and they make me nervous. They suggest that
you cut it just above the glue line. I've noticed that in some speakers the
voice coil leads exit through the cone just a fraction below that glue line
of the dust cup. Think I'll pass. Guess if you were doing this every day you
would probably get pretty good at judging where and where not to slice.

Do you have a link to MAT?

www.matelectronics.com They do have a $25 minimum but that's better than
shelling out $25 and getting nothing but 1 pair of surrounds.

RM~