Datz wot I woz thinkin, too.....
(open cell mo bettah)
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Datz wot I woz thinkin, too.....
(open cell mo bettah)
My vote was for open cell, too. Sounds better used there than closed cell. Been there done that.
FWIW, I've had really good results with acoustic ceiling tiles cut to shape/form. They make my M19s the look like ghetto crap though.
The current versions for sale that I am aware of are not comparable to the stock versions. Either the finish is hard and crusty (like the ones I already have), or the geometry looks compromised. Just trying to get info on the stock M19 foam in order to duplicate on my end.
Then I'll have something to use as a baseline for experimentation. And will make the speakers look stock when I sell them.
Well, unless someone has a copy of Altec's parts spec sheet, we're probably down to guessing as to what the foam's density is, so considering Dr. Geddes's considerable effort to tame his WGs using foam, I'd start with his 30 ppi density solution used in fish tank filters.
GM
I still wonder why they could'nt have made the originals so they'd last for a longer time.
I mean, acoustical foam inside a recording studio does not rot after 20-30 years does it?
Russ
I thought all foam stuff rots after awhile. Doesn't it?
The open cell foam grilles on my 1979 Model 9's rotted after only 5 or 6 years. It all depends on how much sunlight they are exposed to. The sun (I assume infrared) really causes them to deteriorate. I still have the plastic frames. I don't know that there is a market for new foam on those. The mid's and tweet's are gone too, so it is pretty much a lost cause.
I have the foam from Paul and Debbie on my 19's. That seems to be as close to factory as I have seen. I expect that I will need to replace again in a few years. I hope Paul & Debbie are still in business at that time! I try and keep the 19's out of the sunlight.
Carl Bill
I have some of Paul's foam as well. I think if I recall correctly, when asked about the longevity of the new foam, Paul said that the chemical composition had changed since the 80's and should have a longer lifespan.
Quote:
Originally Posted by GM
Hi GM,If you need ones for the 511 I have their phone # and could call and ask if you need them. Regards
I received an email from the Darst's. their computer had been down. it's running again and they will take orders. the delivery time may be a bit long as they have no stock.
regards
Les
It took around two months, but today I received my foam surrounds. They fit my Model 19 clones very well and look well as well. I would say there is some effect on the high frequencies, but I am as yet unsure. I'll report back later.
Worth the wait and the money in my opinion.
regards.
les