4 Piece Sonic Sitka Vault 5574 Arch Top the boards are classified into

the boards are classified into various groupings

Every sonically graded board is required to meet the following specifications:

and are therefore more consistent in all of their physical properties

These tops allow us to make soundboards from smaller diameter logs and to utilize each log more completely

both for its strength-to-weight ratio and ability to resonate

4 Piece Sonic Sitka Vault 5574 Arch Top the boards are classified intoPRT 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. Density, Q, and Stiffness are all provided, allowing you to choose the piece that exactly fits your