Kimball also had a "Pipe Organ Tone Chamber" in certain select models. Story and Clark had the "Incomparable Storytone Mahogany Soundboard". It was guaranteed for life against splitting or cracking. The "Tone Moderator" is found in the new Kawai K-50. Steinway has the "Diaphragmatic" soundboard. Mason and Hamlin, the "Centripidal Tension Resonator". Who had "Perma-Crown" soundboards? This could get to be a big list. Ron N
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