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simark

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  1. Hello guys; A few weeks back I posted that I was going to seal the surrounds of my AR-4's. I did it with thinned down latex sealer and some black acrylic paint. Like I reported, the difference was significant. Since then I bought some of the Global WD Dampener Adhesive and proceeded to reseal the cloth surroundson my AR -2ax and AR-3's. Thinned with some water and another drop of black paint I can't say if the resonances were changed because I don't own a generator, but I notice that the bass has improved with the AR-3's. I really can't detect any changes to the AR-2ax's but I had to recap all the x-overs anyways (cap values had increased X4 in some cases) and I also tore apart and cleaned out all the pots. The Global WD solution may be PVA, but it sure didn't smell like any PVA that I've ever used. I telephoned the company and spoke to Rhett Molitor, I think he is the manager there. He assured me that this formulation was developed not to dry or stiffen over time. I put a fairly thin coat on so I'm crossing my fingers hoping that I didn't change the Fs too much. Global does have a Black Nitrile adhesive BC series. According to their site http://www.globaladhesives.net/surround_adhesives.htm "These nitrile rubber cements are designed to bond cloth and foam surrounds to the frame and cone. They are also excellent for bonding gasket and spider to frame." I wonder if this would be another suitable sealer for the surrounds?
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