The Yamaha UX5 incorporates a very special and unique touch, comparable with Grand pianos. Designed to meet the needs and expectations of the most demanding pianist.
Sostenuto pedal feature, hand crafted keys are equally balanced and weighted, while the keyboard action is precisely adjusted to maximize expression.
I couldn't find a more detailed description but if you are serious about the UX5 I am sure more details are available. I purchased this piano in 2001 and played it very little. It had 8% wear and kept in very good condition, moved only once. Bluebook for slightly used in 2001 sold listed for $15,890.00 asking $4000.00. or best offer
Please call for more details or any questions you may have.