Flowmaster_G
Joined: Nov 09, 2006
Posts: 140
Los Angeles, California
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Posted on Feb 22 2008 11:35 AM
Hey
Tech question for anyone who actually knows this stuff....
I have a guy who wants to sell me a JBL D130 that was originally 16ohms but that has been reconed as a D130F 8ohm speaker.
Can a simple recone job on a D-130 change the speaker from 16 to 8 ohms? and Can a simple recone job change it's performance from a D-130 to a D-130F?
Thanks to anyone who actually has some knowledge on this topic who would care to illuminate me.....
g
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Pyronauts
Joined: Feb 27, 2006
Posts: 1166
Northern CA
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Posted on Feb 22 2008 12:00 PM
G,
I think that you can have a D130 reconed to 8ohms. I've got a few of these speakers. Two of them are 16ohms that I've been meaning to get reconed to 8. The other one was previously reconed to 8, I had it reconed after it blew the first time, then when it blew the second time the dude told me they couldn't recone it because it was a weird year. Since then I haven't had the time to go to someone who actually knows what they're doing.
But yes, shouldn't be a problem to change the Ohms from 16 to 8.
Paul The Pyronaut
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surfer
Joined: Apr 12, 2007
Posts: 428
South Florida
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Posted on Feb 22 2008 01:02 PM
I'm a JBL Pro dealer, make sure the recone is a factory part not a gray market, and make sure the repair guy has done a few, theres a real art to it, and there are abunch a guys out there that will tell you it's the real deal and then sub fakes, they will not sound the same.
— www.cutbacksurfband.com
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eddiekatcher
Joined: Mar 14, 2006
Posts: 2778
Atlanta, GA
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Posted on Feb 22 2008 01:04 PM
Here's the deal. There are NO original JBL D-130 parts. There are a number of aftermarket kits, some of which are supposed to be dead ringers for the original factory parts. I have had a sad number of D-130's reconed by people who are supposed to know what they are doing "with real JBL parts", and none of the recone jobs sounded good. JBL can adapt modern parts to retro fit the older speakers but the cost to have them modify the speaker frames is in MHO outrageous.
The origainal speakers had a very tight voice coil slot (.056"). Some of the last D-130's had the modern slot width of .086". Unless you have some of those rare frames, the current kits will not fit without a factory frame modification. The early speakers were louder and smoother than the later ones because of the tight tolerances but burned out much quicker because of a lack of heat dissapation.
If you have a good working 16 ohm speaker....leave it alone. If your speaker is already toast then go buy a number 44 drill bit and slide it down in the open voice coil slot. If it fits, modern factory parts can be used to rebuild it to 8 ohms. Although the magnet assembly does have an effect on speaker impedance, an 8 ohm kit will successfully convert your speaker from 16 ohms.
Good luck
ed
— Traditional........speak softly and play through a big blonde amp. Did I mention that I still like big blonde amps?
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