The Yanagisawa T901 incorporates many of the innovations that make every Yanagisawa model an incomparably fine instrument. Outstanding projection, full-bodied tone, lively response and Yanagisawa high precision engineering. A great upgrade and in fact pro Sax. The Yanagisawa T901 has a underslung model on the 991, the 901 also has its pillars individually mounted directly to the body which allows the base brass to really sing. An exceptional saxophone that the jazzers will like because of its bright, brilliant and punchy sound. It also has broader appeal with the classical players who appreciate the excellent tuning, immediate response and total reliability.