What is the difference between a paulownia back board and a plywood back board?
Back board is also an important factor that determines the sound quality of a guzheng. The back board kicks back the sound and absorb the sound passing down. A plywood back board does little in absorbing the sound which leaves the sound blurring together inside the sound box. Thus, a guzheng with plywood back board doesn’t sound clear. Even though you tune it 10 times, it still sounds out-of-tune.