The Instrument martin series have excellent value with a solid spruce top and Fishman electronics that will blow you inner musical mind. It features a solid spruce top with a customized rosette, and a back and sides made from a durable,” forest friendly” HPL material. The strong Stratabond neck and robust Richlight fingerboard are combined to deliver a fast, even play ability all across the neck and equipped with a reliable Fishman electronics. And ready to plug into any amp or mixing board. The custom X1-DE has the sound and feel of a highly collectible Martin at a price that anyone can afford. To know more about it, you can always look for the specification. It is very important to know you product and specification can satisfy that.