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In Reply to: UMMMM posted by abc on July 08, 1999 at 03:35:45:
I may try this on a fostex FE164 or ( ~$300 ea) F200A in a ported box. Do you remember what issue of Discovery?Lewis
I'm sorry but I don't remember.It was about ten years ago.An afternoon at the library would turn it up.The salient points were that Strads used delignified wood(soaked in water for years before drying and sawing)and the type of cellulose used for the finish.Strad used flying insects(mainly dragonflies)as the base.Examination of at hand materials showed shellfish(shrimp hulls)had the same acoustic properties,although the orang-ish color of the finish was a little off-putting.Dye could be added.You need to decide how long the molecule chains should be and how they cross-link,and whether the finish should just sit on the surface or soak in to the spaces in and between the fibers.When I played with this I bought cases of full range inexpensive speakers(tv and drive-in-movie types,USD ~$1.50ea)for experimenting.In your situation I would experiment on inexpensive drivers first and inquire as to the cost of re-coning before doing the Fostex.
ummmm. It seems you have alot of experience with this stuff and other. Why should I be so careful with the genuine (c37) on a pair of cones or was this for a sub??Lewis
I have played with things as diverse as Elmer's glue to hairspray on speaker cones.They all change the sound.You can apply the same product the same way to two different brand midranges and hear different changes.In other words what constituted an improvement in one did not give the same result in the other(it often sounded worse).I was having a big problem with the cones on 15" woofers tearing for a while(pro sound use).In a horn cabinet the cones were tearing radially from the voice coil to the surround(looked like a starfish)and with another customer they tore in a circle just under the dust cap.Cerwin Vega used to treat their cones by dipping the neck of the cone in laquer to stiffen them up.I tried many combinations before realizing that it was an amplifier problem not a speaker problem(the starfish guy was the clue.I tried three different woofer types with different cone and surround types.They all failed in the identical fashion).As I see it the question is surface treatment or soak it in,and of course how much? I'm sure there is no cookbook response that would please all.
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