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 Post subject: AR-2 reconing
PostPosted: Nov Wed 24, 2021 1:24 am 
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Joined: Jan Mon 24, 2011 7:21 am
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Location: saint clair shores, michigan
After refoaming the woofers on my Cerwin Vega speakers, I think I might take a crack at reconing the woofers in my acoustic research AR -2 woofers. One of them stopped working shortly after I purchased them. I have found kits for various acoustic research models, but not for the AR-2. Does anybody know a good source?


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 Post subject: Re: AR-2 reconing
PostPosted: Nov Wed 24, 2021 3:49 am 
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Location: near ST Louis Mo 62002
https://www.ebay.com/itm/352009639883?e ... xytdlQ-j9V

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 Post subject: Re: AR-2 reconing
PostPosted: Nov Wed 24, 2021 4:30 am 
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I need to recone, not re-foam. The speaker is blown

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 Post subject: Re: AR-2 reconing
PostPosted: Nov Wed 24, 2021 4:45 am 
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https://www.ebay.com/sch/i.html?_from=R ... r&_sacat=0

https://www.ebay.com/itm/324227923049?_ ... QWkC80W%25

What is the size of the voice coil and impedance ,

https://www.speakerworks.com/speaker-parts-s/33.htm

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 Post subject: Re: AR-2 reconing
PostPosted: Nov Wed 24, 2021 5:10 am 
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Location: saint clair shores, michigan
Maybe I am getting in over my head to here. The reforming I did, which I did a thread about two weeks ago, was the first one I ever did. I was expecting that to do a reconing that the voice coil would already be attached to the speaker cone.

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 Post subject: Re: AR-2 reconing
PostPosted: Nov Wed 24, 2021 1:25 pm 
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The most frustrating thing about re-coning these days is getting the correct parts. The shop I moonlight for gave up on that... every order was wrong... it took 4 tries to get the proper cone or voice coil, so all they do now is re-foaming.

But IF you can get the proper cone, it's roughly similar to re-foaming, only the adhesives are different. It's still just a matter of getting everything centered properly, and of course you may have to be concerned about attaching wires depending on how deep you go.

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 Post subject: Re: AR-2 reconing
PostPosted: Nov Fri 26, 2021 8:20 am 
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Best answer might be to remove the old cone with coil still attached. Spider may need to have its glue bond relieved as well to separate it from the basket. Unsolder the braided wires at the speaker terminals at a convenient time during disassembly.

It's sometimes possible the break can be spotted close to its exit from the coil. You can extract the broken lead and try to reconnect it, then fully secure it from interfering with cone travel. You don't necessarily need to fish it through the cone to attach at the factory point. Just unwind enough wire off the coil to get to its destination, clean the free end to bare metal and connect it to the braid near the cone from behind will be sufficient, so long as its secure when rocking out. Glue it to the backside of the cone if need be.

Then reassemble. Easy peasy! :mrgreen:

Or... if the repair didn't take, remove the failed coil/former and spider, and firmly shim new coil in the basket at the proper depth to allow full travel. Hopefully you noted the old coil's depth at rest position to aid in this. Reglue the other stuff and align as per a more normal recone/refoam.

Sometimes it works with no new parts needed and you may not have to remove the coil or spider from the cone, or even the surround if it's rubber and still good. With the driver itself already in a failed condition, nothing's really lost with a botched attempt, just the time and effort in trying. Just tack things in place to avoid having to remove all the new glue to start over. Remove shims and hook it up to an amp at low volume. If the low volume test shows promise, go ahead and glue more permanently.

When I did this a few times back when, I didn't dissolve old glues, I just sliced it apart with exacto blades and reglued the cuts. Ugly, I know. :shock: But ears don't hear ugly appearance, at least mine don't!

I did a photo writeup on this "technique" on Audiokarma some years ago in a long-running thread of my Fisher SP-7 rebuild.

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 Post subject: Re: AR-2 reconing
PostPosted: Nov Fri 26, 2021 8:21 pm 
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Joined: Jul Fri 18, 2008 10:02 am
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Location: near ST Louis Mo 62002
https://www.ebay.com/itm/185052783624?h ... SwfXJhQlOl

See if he will deal , or buy replacement .

://www.ebay.com/itm/174179716560?_trkparms=ispr%3D1&hash=item288deb8dd0:g:oW0AAOSwOFFeN0HD&amdata=enc%3AAQAGAAACoPYe5NmHp%252B2JMhMi7yxGiTJkPrKr5t53CooMSQt2orsSDAeS9EQtjPGVfKXTxF0%252BjgJB7eEcO9NIC5%252BzVOOFnesFLHhb7OpVL8IV7da22ymvJs21eZ6ea8QyInC1JEdPysLAopM7qUn9ZoRNn0PgS5ILb3y0KBGJEN%252B208%252FGf4Rpfnht%252FAOowGn8X%252FESitRolfixwmdaqRy0hfcUtZVDXJwn%252B0HY8Hj4xV40E1RIq65liJenC5jsz1Rah1X1SgZ61WX%252FzvMm1gceIbUOAkVVy8uwJvgu0EXrSzZaha6WfJI9xTJT3vxFfNn%252FeWH5rZiypNLjjja5BT%252FUjDFT12hUg8RD5MZDjpI3UjL9CWvkC0t9O5q9xR1TWpNXNqrhTSVy1lYPvjC3WOme4VShBS2dxTroIjrQvyJYrhZmdAUWMTKlAY5lKBr3JMblG7JS%252FZxiGDutU2Qiqt2MshZnAHGB94Ksq2VxNuwZa%252FPLcrs4O38fjaFj4XrzXW5HX1HnNINw8CK7DgWCvpmqo7KjMchF6SnNm3J2mapdJRQ4xfDqzs8PYYLxebjY6iNcZ8kS9nhv%252BrVmR4A8CgoDtLZUJl1xXw%252FXgXl01YQG5u0F219K3FkEKTQjM%252Bd6cI%252BQZSMVUHdayOsVcH2pY80mWKVTFlWJBuj7vfLu8%252Bc4CY8D%252FZR8Rxq%252F%252BRE5Td5VqCiyvEfjq%252B172gfBdJwNsmuoa6aDfsvJhIZR41g1F3Ogj00df6RxMwlOBBNWby6dZC6AfzvByp3UOHeTDPfhFjrNfPAGmSAAObglKptI1loG5OqqBtyHfSgUVyVAZXuNcKNs0km9xplFLkt7vfj35JHiThOGFk%252BA8JjhrUnuex%252Fe1cLEmiSL0yXxnQr%252FYxfMXy3qkM7JS3UgBg%253D%253D%7Cclp%3A2334524%7Ctkp%3ABFBMqNLq26tf

Better than sitting in pieces .

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