I found this forum after looking for speaker restoration tips. What a help. I'm the original owner of two L-100's I bought in 1976, and two 4312's I bought in the mid 80's.
I have a few questions which everyone could help me with.
1. In replacing the foam insert in the cover, there is a fine mesh cloth underneath. Unforetunately in the pre-internet days I used a hot melt to place non-oem foam in the walnut trimmed cover. I'm slowly getting all of that crap out in prep for a replacement either with the cloth used in later L-100's or modern foam.
However, I haven't seen any posts on what folks have used to replace this mesh cloth. In using cloth, are folks cutting 1/4" oak plywood to match the speaker pattern, and wrapping it with the blue cloth. If I dont use foam, what is the preferred method for mounting the cloth? Can anyone offer any help.
2.Is the blue OEM JBL type cloth available, or will there be another buy in the near future; where I could get enough to do 3-4 pairs of speakers? Where was that cloth bought, and can we just buy smaller amounts ourselves?
3.In my 4312's the crossovers sound "scratchy" when adjusted. What can I do to fix these? Can anyone suggest a reliable way to rebuild those to the original spec?
4. Like others, my wife used to look at my L-100's and say--Wow what a great place for a plant. Is there amu sure fire way to remove water stains, or do I just dry sand?
Unforetuantely I'm a chemist not a EE, so figuring out the design of the crossovers go over my head, however I have access to several EE's at work who'd be glad to help me rebuild them; if I can get the schematics for them. Either that or I'd go for having them rebuilt after I've finidhed the cabinet work.
Thanks for the help, I'm glad I found this forum. Over the years I've steadfastly resisted buying any of the smaller (so the sales guys say "better") modern speakers. I've always been quick to point out that in several movie theatre's I seen 4312 control monitors used for THX applications; but I've never seen these midget speakers used like that.
Thanks for the forum and the help in advance, JBL rocks.
Larry