precise refinements in their materials, construction and production for an improved overall performance. The U1 and U3S pianos feature a new scale design, delivering rich, resonant tone with evenly balance timbre over the entire range of the keyboard. The ribs and soundboard are crafted from the finest timbers and accurately configured for optimum sound reproduction, while new backposts provide increased strength and improved resonance. Hammers on the U Series upright pianos are crafted from select materials, chosen for their durability, while the precise piano action provides exceptional control over tone. The unique soft-shut fall system prevents the lid slamming onto the keyboard or the pianist's fingers. And in addition, the U3S and U5 both feature a sostenato pedal. Taking its lead from Yamaha's grand piano design, the top of the range U5 piano is scaled using brass agraffes in the bass an dtenor section for a warmer sound. It also features a longer music desk for larger scores, which tilts forwards, increasing the projection of the piano's sound.