List...the foam inserts for this purpose are most definitely NOT styrofoam. They are made of Markerfoam, an acoustic foam of the type used in recording studios, etc. While it is true that any foam inserted between the wood frames of a piano would dampen the sound, the inserts from Edwards Pianos have been show to be highly effective in reducing volume, while having a minimum impact on the tone quality. If you want to see the test results from experiments done at Yamaha back in 1991, we can mail or fax that info to you. In general, the 3" acoustic inserts show a 5db reduction. To most ears, this would constitute about a 40% reduction. The inserts are available for all makes of pianos, although it may be necessary to provide a pattern. They are installed by simply pushing them into position. Since they are cut slightly oversize, the will remain in place without adhesive. In Yamaha Disklaviers, at least, it is not necessary to be concerned about the heat from the power supply, since the switched type of power supply used in all Disklaviers does not get hot. Ever. Likewise, given the location of the pedal solenoids on the pedal rods themselves, there is no chance of a problem resulting from contact with the foam. Hope this answers your questions. Steve Pearson Yamaha 800/854-1569 >>> "pianoman" <pianoman@inlink.com> 08/19/98 05:16PM >>> Hello, Is any one familiar with the Styrofoam inserts that go underneath reproducing grands to quiet them down. I had heard that LaRoy Edwards had kits for the different models of Yamaha. Anyone one know how much and how much effect they have. Anyone know what is the best device for cutting Styrofoam is? band saw, whatever? Just an idea. James Grebe R.P.T. of the P.T.G. Since 1962 in St. Louis, MO Home of Handsome Hardwood Caster Cups pianoman@inlink.com
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