Kawai BS-10 soundboard

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Alan k75
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Kawai BS-10 soundboard

Post by Alan k75 » 10 Jun 2018, 19:04

Dear all,

I just purchased a used Kawai BS-10 piano but I realized the back panel where the soundboard is does not have any vertical wooden frame at all. Although the staff assures me this is typical of BS-10, I just can't get over it as all other brands or models have some form of vertical frame or cross frame

I tried to search photo of BS-10 soundboard/back frame photo but to no avail.

Hope someone can help me here. Thank you in advance.

Alan k75
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Re: Kawai BS-10 soundboard

Post by Alan k75 » 11 Jun 2018, 04:11

I forgot to mention there are no small strips of wood on the soundboard itself either which is again strange to me.

I am new to piano what's more a used piano and any advice will be appreciated. Thank you.

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Barrie Heaton
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Re: Kawai BS-10 soundboard

Post by Barrie Heaton » 11 Jun 2018, 13:21

The posts are called bracings and many makers did not put them on in the 60 - 80s to save money and space. They do make the tuning more stable in a changing environment and if you move the pian across a room.

The diagonal strips are called Ribs they transmit sound across the grain on the soundboard and support the crown

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chrisw
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Re: Kawai BS-10 soundboard

Post by chrisw » 11 Jun 2018, 13:37

Barrie,
If braces are absent from the rear of the piano, surely the frame must be supported somehow from inside the cabinet, presumably the sides. I think I would be more worried about the absence of ribs on the soundboard. Is it possible that at the back of this piano is covered with a wooden panel ?

Photographs of the rear and the front of the frame with the cabinet front removed would perhaps be helpful (?).

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Barrie Heaton
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Re: Kawai BS-10 soundboard

Post by Barrie Heaton » 11 Jun 2018, 13:59

photo is useful
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