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locking in the radial stiffness
These tops allow us to make soundboards from smaller diameter logs and to utilize each log more completely
Sonic grading is fundamentally different from traditional grading because the process relies on data and mathematical models to classify each board
Every sonically graded board is required to meet the following specifications:
Sitka Spruce 4 Piece - Sonically Graded Redwood Tops locking in the radial stiffnessPRT is proud to bring a 4 piece top to market. These tops allow us to make soundboards from smaller diameter logs and to utilize each log more completely. Four piece tops are cut from a smaller section of a tree, representing less of any tree's life (say 60 years, instead of 120), and are therefore more consistent in all of their physical properties. If sonically graded, we measure them with BING testing for density, stiffness and Q (damping). Every
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