DizRotus Posted June 26, 2016 Share Posted June 26, 2016 (edited) A friend is considering the purchase of kg4.5 speakers. The seller candidly acknowledged that the rubber surround on one of the woofers has a small cut that he repaired. It seems to me that it probably presents no significant problem,assuming the repair is airtight. If the woofer is compromised, are replacements available? I'll check with Bob Crites. What are your thoughts or experiences with similar repairs? Edited June 27, 2016 by DizRotus Quote Link to comment Share on other sites More sharing options...
Marvel Posted June 27, 2016 Share Posted June 27, 2016 Depends on how he did the repairs. Is that model ported or use a passive? I used the cigarette paper/tissue and Weldbond on the back side of some JBLs with rubber surrounds with lots of splits. They've been rockin' fine for over 10 years. You can get Weldbond at HD, Walmart, etc. It dries clear and remains flexible. Thin the Weldbond a little and use multiple coats. Bruce 2 Quote Link to comment Share on other sites More sharing options...
DizRotus Posted June 27, 2016 Author Share Posted June 27, 2016 (edited) Thanks Bruce. The kg4.5 is ported. Edited June 27, 2016 by DizRotus Quote Link to comment Share on other sites More sharing options...
tube fanatic Posted June 27, 2016 Share Posted June 27, 2016 I used the cigarette paper/tissue and Weldbond on the back side of some JBLs with rubber surrounds with lots of splits. They've been rockin' fine for over 10 years. You can get Weldbond at HD, Walmart, etc. It dries clear and remains flexible. Thin the Weldbond a little and use multiple coats. Bruce Toilet paper (unused ) and nail polish has worked flawlessly for me for the past 55 years! Maynard 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted June 27, 2016 Share Posted June 27, 2016 (edited) Toilet paper... This could also work, but usually, the fibers are very short and designed to come apart and break down. However, if it has worked for you, I won't disagree with its use. The KG4.5 is ported. I was just thinking, probably incorrectly, that there me be slightly less stress on the surround on a ported cabinet, but in the grand scheme of things, the tissue works like any good patch, to hold the glue an d distribute the area under stress. The two different JBL models I did were both sealed cabinets. I took the woofers out and put them face down, so I could apply the glue/tissue to the back of the surround so it was pretty invisible. you couldn't see the splits after I was finished. I did use thinned Weldbond and a very small paint brush (artists brush) to coat the entire surround on the front and back. Very thin coats, almost like brushing on water. I thought this might help in keeping more splits from developing. The argument has been made that the stiffness of the suspension has changed, but without having the drivers tested, you will never know for sure or how much. I've not heard complaints from the owners on how they sound, so I wouldn't hesitate to do it again if needed. Bruce Edited June 27, 2016 by Marvel 1 Quote Link to comment Share on other sites More sharing options...
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