I've always assumed that as decent uprights such as Yamaha YUX/YUS models have massive treble pressure bars, whilst cheap Chinese whatever models apparently use tin-foil, that it does indeed make a difference to sustain and clean tone. Scott Jackson Australia -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Ron Nossaman Sent: Friday, 30 May 2008 10:08 To: Pianotech List Subject: Re: Massive Pressure Bar > I tuned a new Heintzman 126 the other day and noted that the high > treble > pressure bearing bar was about three times as massive as the pressure > bearing for the midrange of the upright piano. > > I curious why this was done. Anyone know about the thinking that goes > into this? > > Andrew Anderson >I'm presuming it's an attempt to improve the treble sustain by >minimizing termination losses at the top. That, or the sales >staff needed something to point to, since they didn't list A-0 >length or soundboard area in the brochure. >Ron N
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