Repair Cracked Soundboard

  
 

 

 


- Soundboards -
What you hear is
    What you
        Get!

 

  

 

  When an object vibrates, it creates rapid variances in barometric pressure which we perceive as sound. A vibrating string displaces very little air (about .25 cu. in.). However, when that string is attached to an 1800 sq. in. board, the amount of air displaced goes up to 115 cu. in..That produces an amplification of 45,000%. Is it any wonder why it is called a soundboard?

Contrary to what the name implies, it is not one board, but several planked together, much like a hardwood floor. When a soundboard cracks, the most effective repair involves cutting out the crack and planking in a fresh piece of spruce.		  

 

     

  1. Soundboard Cracks 1&2
     
  2. Soundboard Crack 3
     
  3. Proof that Glue Joint is Stronger
       than Wood
     
  4. Routing Crack (1)
     
  5. Routing Crack (2)
     
  6. Cutting Shim
     
  7. Gluing Shim #1
     
  8. Support Underside with Wedges
       and Pylons
     
  9. Chisel Off Excess
     
  10. Finished Shim
     
  11. Gluing Shim #2
     
  12. Gluing Shim #3
     
  13. Cracks Repaired
     
  14. Scraping Bridge
     
  15. Scraping Soundboard
     
  16. Sanding Soundboard
     
  17. Sanding with Finer Grit
     
  18. Hand Sanding with Still Finer Grit
     
  19. Spraying Sealer
     
  20. Toning Shims to Blend with Soundboard
     
  21. Sealing Shim Stain
     
  22. Applying the Finish Coat
     
  23. Plate Installed / Ready for Stringing

    24.

 

 

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metropolitan area
with
moving • tuning • repairing • rebuilding • concert rentals
     
Jones Piano House
5742 N. Lenox Ave 
          Kansas City,  MO  64151

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