HTT technology effectively improves the strength and stability of selected edger-grain Sitka spruce tops, which can better withstand the force of fingerstyle and ensure clear sound. And maintain relatively assured. The back and sides are made of plywood rosewood, which gives a balanced performance of sound in various bands, good extensibility, and brings a rounded and sweet taste. The combination of high-quality tonewood makes the overall layers of sound strong, and the fit between each frequency is high.