Al Guecia/AlliedPianoCraft wrote: > <snip> Rebuilding with an existing board, thinning the bass (or > channeling like Overs and Seiler) can be very worthwhile. > > Can you explain how you do that? > > Al Ron O has a photo on the opening page of his website http://www.overspianos.com.au/ showing the soundboard with a channel routed around the inner rim in the bass, thinning the panel perimeter. This is a laminated panel, so tapering it wasn't a reasonable option. The channel did the trick very nicely. Another approach, on a solid panel, is to plane, chisel, grind, gnaw, or otherwise reduce the thickness of the panel perimeter around the edge of the bass, tapering it back to full thickness in the middle. If you have sufficient back scale length in the bass to make it worth the trouble (since you already have the plate out), it should help bass response noticeably. If you have the classic 40mm back scale on A-0, don't bother. Ron N
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