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View Full Version : l-65 jubal refoam DIY?



sunnysal
02-21-2006, 09:30 PM
I have a pair of jubal l-65 in westchester NY with rotted foam surrounds on the woofers...should I try to do this the refoam myself? who sells kits? if not who near here can do the job? thanks! tony

JuniorJBL
02-21-2006, 09:43 PM
Read this and decide for yourself if you think you can do it.

http://www.audioheritage.org/vbulletin/showthread.php?t=469&highlight=cobb

You can also do a search for re-foam or re-surround;)

sunnysal
02-22-2006, 08:24 AM
Looks doable, I wonder where the best place to buy refoam kits would be?

I have seen some kits available with pleated/rubberized paper (like the 4311, L100) I suppose the compliance would be different but I wonder if I could use one of those (no more changing ever!)

I wonder whether there is someone local who could do the job for me? anyone know anyone in the lower NY area?

thanks, tony

grumpy
02-22-2006, 09:51 AM
I have seen some kits available with pleated/rubberized paper (like the 4311, L100) I suppose the compliance would be different but I wonder if I could use one of those (no more changing ever!) Kind of like putting monster gumbo mudders on your Buick... wrong application for most. -grumpy

4313B
02-22-2006, 10:03 AM
I put them on my VW... they do look kind of goofy now that you mention it. :blink:





khorns in living room 4311s in my study/office, guess where I spend more time?

:dont-know Sounds like a no-win situation to me.

D'oh!

Robh3606
02-22-2006, 10:15 AM
Have they been in the speakers or out on a shelf??

Rob:)

sunnysal
02-22-2006, 11:39 AM
I have seen some kits available with pleated/rubberized paper (like the 4311, L100) I suppose the compliance would be different but I wonder if I could use one of those (no more changing ever!) Kind of like putting monster gumbo mudders on your Buick... wrong application for most. -grumpy

just checking...tony

grumpy
02-22-2006, 12:27 PM
I wonder whether there is someone local who could do the job for me? anyone know anyone in the lower NY area?

That part, someone here can likely answer. Regarding refoam kits, you might want to
talk to Rick Cobb <[email protected] (rcobb%20%[email protected]%3e)>. Not paid to shill for him, but I've used
his kits and been happy with the result.

-grumpy

sunnysal
02-26-2006, 08:33 AM
thanks. tony

BMWCCA
02-26-2006, 09:34 AM
I'm contemplating the task of refoaming six 12" JBLs (4x128H and 2xPR300). So far I have to say Rick Cobb has been very helpful in answering questions about the makeup of his kits, and very accommodating in offering to make up an order for me with no more or no less than what it takes to do the job right. I feel I'm up to the task but didn't look forward to having to pop the dust caps and shim the voice coil. Rick's advice and parts along with the help on this forum make it look easy. Even for a novice. This ought to get you to all you need to know: Rick Cobb (http://cgi.ebay.com/BEST-Speaker-Foam-Surround-Kit-for-JBL-12-L65-L150-2203_W0QQitemZ5871623331QQcategoryZ3276QQssPageNam eZWDVWQQrdZ1QQcmdZViewItem)

We'll see. Thanks.

speakerdave
02-26-2006, 11:31 AM
(no more changing ever!)

The new foams will last a couple of decades, probably. A refoam every twenty years or so is small price to pay to maintain the bass performance of those speakers.

David

duaneage
02-26-2006, 11:51 AM
I've got a pair of 128H woofers rattling my room right now, definately worth the effort. My God they create clean bass.

speakerdave
02-26-2006, 12:13 PM
Yeah. The 122 in the L65 is good too, although the speaker should be mounted on some kind of stand about a foot off the floor (my experience, anyway). The L65 is a nice speaker. The bass definitely would not be the same with a 4311 style woofer. On the other hand, if you want to use the L65 with a subwoofer, you could put in a different 12" and stick a sock in the port. I would not install the wrong surrounds on the stock woofer, though. That would permanently mess it up, and it would then require a recone to be restored to stock condition.

David

sunnysal
02-27-2006, 12:24 PM
thanks for all the feedback, I hate the idea of having to do the work myself (I KNOW I will screw then up) but perhaps it is my only alternative. I did the job once on a pair of Inifinty bookshelves and it turned out ugly but workable so I guess I could tackle it. I will let y'all know how it turns out. Tony

Edwards
02-27-2006, 01:56 PM
I have had lots of work done by Millersound Labs in PA, They work fast, they only replace what is absoloutely needed, the results are like new from the factory, and the price is not much more than you will pay for the kit, and be stuck with less than great results.

Bill Legall at 215-412-7700 I can not say enough about the quality of his work.

sunnysal
02-28-2006, 12:00 PM
thanks! tony

sunnysal
03-28-2006, 06:17 AM
I just ordered the kit from Rick Cobb, I will let y´all know how it goes...thanks, tony