negativ curved soundboard

[Kerry Cooper]

How did you measure the crown? Was it from the top of the bridge or from
under the piano? 

If it was from the top of the bridge, then it could be that the frame has
not been installed correctly.

 

Kerry Cooper ARPT

Piano Technician 

Brisbane Piano Centre

(07)3809-0652

0412-033-379

brispiano at optushome.com.au

 

Kerry Cooper

Brisbane Australia

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of danny boddin
Sent: Thursday, 19 June 2008 5:54 AM
To: Pianotech
Subject: negativ curved soundboard

 

Custommer wants me to write an expertise on grandpiano Kawai GS80 2.40meter
° 1980 bought in a pianoshop in 2005

The piano was renovated at SAP in Poland. The duplex bridges where not
installed correctly: they started at the left and end up with one string
left without, unisons don’t fit on the same duplex,  anyway this is already
a main reason to complain. Some comments on this duplexproblem  related to
tuningstability are welcom.

 

The soundboard is negativ crowned. I think: soundboard originlly dried for
Japanese market, in renovation at SAP Poland extrmely dried out, restrung
with to much downbearing and finally collapsed negativ, any other thoughts
about why a soundboards becomes negativ crowned? Custommer payed 15.000 EUR
for this instrument,

Should he accept the fact of negativ crown? Will the board get even more
negativ figures in the future? Any experience how negativ crown influences
the sound and why?

 

Be happy to get a lot of comment on this issue,

Greetings from Belgium

Danny boddin

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