Hi Susan, Terry and whomever. I dont believe you get any real volume boost either, tho I've never measured to be sure. You certainly can notice beats when the 3 string unison is clean as a whistle but the raised 4th string is not at the same pitch tho. You can actually create some rather kinky effects by offseting the 4th string either sharp or flat depending on what you are after.... or you can just set it clean to the others. All that aside... I really wonder sometimes if this extra set of strings was really meant as a way of attempting to supply some extra support for the soundboard. I have two of these that I service. One an older model with the extra string in both the top two sections, and the other a newer one with extra strings only in the top section. In both cases there is lift on their respective bridges. Just musing in Bergen Cheers RicB ---------- Have fun -- it's kind of a neat system, really. I don't think that thefourth string is for volume. I think that the more complex, less crystalline sound sustains better. Susan Kline
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