Engelmann Spruce is a great soundboard material. It is being used by some builders in place of German Spruce. It has a beautiful white color and has a great stiffness to weight ratio. It is lighter and a little softer than Sitka and is an excellent choice for a soundboard.
2 pieces - .130+" x 8 3/4" x 21 7/8"
These measurements are my minimum tolerance so the wood you get could, but not always, be on the larger side. If you need specific measurements, that will need to be worked out before shipping. Not all sets are sanded, therefore, there will be some saw marks from the milling process. Additional thicknessing will need to be done by the buyer.