Is it true that JBL doesn't have any recones left for the 2245h?
I just ordred a recone for my 2245h and the Norwegian distributor said that this was the very last they had and that they couldn't get any more from JBL...
Is it true that JBL doesn't have any recones left for the 2245h?
I just ordred a recone for my 2245h and the Norwegian distributor said that this was the very last they had and that they couldn't get any more from JBL...
That's what he got. There is not guarantee that's what I would get when all is said and done. The real issue is unless you have the means to re-measure the T/S parameters you won't know how close you are to the original. Yeah it will work but I wouldn't do it as long as there are foam surrounds are around.The result is impressive and the Fs is very close to the original.
Rob
"I could be arguing in my spare time"
Thanks for that link, very good info. Any idea where I can get just the 30 Hz CD? I've already got the surround kit. Since it came with 2 surrounds, I think I'll try it first without cutting out the dust cap. If that doesn't work, I can try again with shims.
What's the life expectancy on these new surrounds? I understand they use a different grade of plastic.
For reference (if it's of help), I posted some information on my 2245H's and the differences between them, along with a couple pictures. http://www.audioheritage.org/vbullet...ht=#post271110
Concerning http://www.geocities.jp/arai401204/E...L2245-Dia.html
something about Fs and Vas before and after 're-foaming' is unusual, not consistent .
Well, may be the "small signal response" is good, but do not forget that 2245 has Xmax (amplitude) of about 9mm (0.35"). I am not sure that such , almost flat 'foam' would allow such large cone movements. May be some kind of SHD and THD measurements would give interesting results.
As http://www.jblpro.com/pub/obsolete/4345.pdf is declared, THD has to be less then 1% "under about 100W input power" , concerning the data that would correspond to 114 dB SPL at 1m.
The surrounbd is not flat at all.
Look at picture #11
There is a guy on ebay selling a pair of 2245's for $300 buy it now price. The thing is they have been reconed with 2240 kits. I know the 2240 surround is not foam like the 2245. So what does that do to the speaker? Change the response, excursion limit?
Is this a deal or a red headed stepchild?
The 2240 and 2245 share hardware (same basket).
Reconing a 2245 basket with a 2240 kit makes it a 2240.
http://www.jblpro.com/pub/obsolete/2240.pdf
Johnny Haugen Sørgård
So it becomes a PA speaker with higher SPL and lose 1/2 an octave off the bottom end. No thanks. But thanks for the info. I just bought lgvenable's 2245H.
I got the 30 Hz CD from svolmer (many thanks) and the surround replacement itself went fine. Just one problem. While playing the 30 Hz CD it was immediately obvious that this speaker has other problems. There is a rattling noise (NOT voice coil rubbing) that gets worse with increasing amplitude. I'm guessing something in the voice coil (the former?) is loose or partially separated. My short term fix was to buy lgvenable's 2245H which I hope to have this weekend.
So my original 2245H can now be a guinea pig for further surgery. What are my options? Obviously a full recone would solve the problem but as I understand it, original factory kits are no longer available. Are there good quality aftermarket kits? Are there any alternatives short of a full recone? I've got a replacement center cap so I'm tempted to cut it open and see if I can get a little superglue on the offending part. What are my chances of success? Any other ideas?
My be you can carefully remove the whole cone (with spider- not to destroy). I am not sure that the surround would survive (but may be can) and after that you can get the final conclusion. May be some piece of plate-hole-foam-cover went into the coil gap. Have a good luck.
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