Allison One woofer replacement
Posted 14 April 2012 - 04:12 PM
Posted 14 April 2012 - 09:50 PM
I may do so, but I expect the Scan Speak woofers/subwoofers, (below 100 hz. in this design,) will probably last me until I am deaf, dead, or both. I would like to have the Peerless drivers fixed, but...then, I would have to find something to do with them. I am not sure that they would still fit into the openings in my subwoofer cabinets. I had to enlarge the openings a surprising amount to get the Scan Speak baskets to fit in the holes that were orginially cut, much more nicely, for the Peerless drivers.
I wish I had stumbled onto this forum sooner. I have cut and pasted your last post with the gentleman's email address. Thank you very much.
Posted 15 April 2012 - 09:06 PM
If anyone on the planet can repair the woofers properly it's Bill LeGall of Millersound. Try emailing him and tell him your problem: Millerspkr@aol.com
He will be rehabbing the last 2 of my mids later this year. I also am doubly blessed as door-to-door for me is a 40 minute drive to hand deliver to Bill.
Posted 30 April 2012 - 02:54 AM
This is an 8 ohm driver and we needed 4 ohm to put them in series.
I came up with a solution that looked excellent where I put them in parallel for 4 ohms,
then added significant series resistance to bring them back up to about 6 or 7 ohms
which was required anyway because the motor is too strong. It was looking good
in simulation but I didn't finish the work. If anyone wants to try this let me know and I'll
see what I can come up with. These are excellent drivers.
Posted 05 June 2012 - 04:07 AM
Posted 05 June 2012 - 04:19 AM
Speaking of Allison One woofers, does anyone know what kind of dope was originally used on the cones & surrounds? The cones look new and are still nice & tacky, but the foam surrounds are starting to deteriorate. I am going to replace the foam surrounds and would like to use the same kind of sticky, black dope that was originally used. I suspect that most today's common dope products would melt a foam surround.
The material was a butyl/latex compound similar to the treatment on very early AR foam surround woofers. There is nothing available today which will not compromise the compliance of foam. You are better off not applying anything at all.
Posted 05 June 2012 - 04:38 AM
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