circle of sound

[Overs Pianos]

>Now, my question is: why does Boesendorfer get decent
>results with a soft rim.  Or, are the results that
>great?
>
>Vladan

They get quite good results from pp to mf, but at 
the higher output levels their designs don't seem 
to cope very well.

>My understanding is that the soft rim is compensated for by a more
>massive soundboard (thickness). 
>
>David Love
>davidlovepianos@comcast.net

Possibly, the ribs on the bigger pianos are also 
quite heavy relative to their strength. The 
Imperial ribs are nominally 30mm wide by 23 mm 
high.

One would expect their light spruce rims to limit 
sustain, and they probably do. But as David said, 
the heavier sound board of the Bös would seem to 
be one factor which is contributing to sustaining 
qualities. The Bös plate is also considerably 
heavier than the lightweight offerings from 
Yamaha and Steinway for example. I remain highly 
suspicious of the tonal negatives, which I 
believe light plates bring to the mix.

Steinway D plates are only around 8 mm thick 
behind the hitch plates. The 225 plate we are 
using for our piano is around 11mm out behind the 
hitch plate. I can't remember the thickness of 
Imperial plate but I do remember that is towards 
the heavier end. Look at the SD-10! Another heavy 
plated and heavily rimmed piano which has quite 
outstanding tonal characteristics once the duplex 
noise and other stringing and strike ratio issues 
are sorted.

Ron O.
-- 
OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
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Web http://overspianos.com.au
mailto:ron@overspianos.com.au
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