Benefit 2015/07/22 As you know, there are two kinds of piano: the one with a grand piano and the one with a upright piano. A grand piano is often used in a concert. Benefit of Grand Piano: 1) It is possible to pounding and trile more 14 times per second (Upright :7 times per second) 2) Longer strings can vibrate more accurately than the shorter and produce wider overtones 3) Responsive key action will give you the power to access premium depth and superlative richness sound 4) The produce a richer, more dimensional sound If you are interested, please contact to your staff