[pianotech] Worst Bass/Tenor Crossover in Universe

Jim Ialeggio jim at grandpianosolutions.com
Mon Jan 7 19:22:22 MST 2013


Dean wrote:

<did you reinforce the cut end of the soundboard? Notice on Del's 
designed boards specifically for bass float that he has a rib run along 
the edge to provide stiffness there.

I ran the last  rib roughly parallel to bass bridge, under the 
monochords, but not under the high bass.  As I said though, the basic 
problem, at least as I see it remained. That is the restriction in 
movement remained.

In my experiment, getting that "float" rib( as I referred to it in my 
sheets) to its orientation and location required an accentuation of the 
radial rib pattern. This accentuated radial pattern had its own 
engineering consequences. That is, the accentuated radial pattern 
created a "hub" of rib origination's near the high bass, adding 
restriction there, while I was attempting to remove restriction in other 
places.

That's why I wonder if the restrictions imposed by the available acreage 
are a checkmate.

Mind you the piano sounds completely musical, but the high bass is not 
its selling point.


Jim Ialeggio

-- 
Jim Ialeggio	
jim at grandpianosolutions.com
978 425-9026
Shirley Center, MA



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