JBL 128H subwoofer with a cabinet resonance of 32Hz and JBL 128H refoamed :
https://picasaweb.google.com/103176186685392443797/JBL128HSubwoofer#
https://picasaweb.google.com/103176186685392443797/JBL128HSubwoofer#
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They sure don't build them like the used to... Thank goodness for that 😀
Looks like it needs refoamed/reconed? Are you looking for parts? You possibly might want to contact the JBL service center in your country.
Were you looking for the for sale section?
Looks like it needs refoamed/reconed? Are you looking for parts? You possibly might want to contact the JBL service center in your country.
Were you looking for the for sale section?
We use http://www.audiofriends.nl/foam-surrounds/ for support of quality foam surroundings.
The 1980 sub fits the 103.2 KEF side systems. It's (not for sale) much more powerfull than today's "thin" speakerdesigns with " wife acceptance factor " WAF incorporated.
Those look like they will be "fun" to do as the foam is on the backside of the cone. Easy to get a good looking finish but a real challenge to clean the old foam off.
JBL do have very close voicecoil to centerpole tolerances, so the important issue is to get the new foam surrounding backside situated very prezise to the woofercone.
The 11" AR woofer among others needs the same attention.
Cleaning of the old foam, is a combination of patience hard fingernails a piece of hard plastic, benzine and alcohol. Do not use alcohol on the surface of JBL's cone treatment, aquaplas. The "white" (128H) aquaplas changes colour by use of cleaning alcohol. Even 128H-1 with black surface from 120Ti does not look good after use of cleaning alcohol.
Take care not to bend or twist the woofercone too much in order not to harm the voicecoil. Use a 4,5V battery to keep the woofercone free from the chassis when cleaning, or use four 1 1/2 inch squareformed pieces cut out from a foammattres to keep the distance.
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