Note 1[Not saying much about SK-3 because I like "bigger pianos," though it certainly was very decent.] The SK-5/6 may not be the most "powerful" of pianos, but they should not be written off lightly since "raw power" alone does not make a good piano. The Shigerus' construction is quite solid from what I can see, though a tech can probably give a better assessment on the construction aspect.The tone is quite "warm" and "round" (far from those Yamaha C-series brightness that people usually think about when "Asian pianos" are mentioned). Good tonal consistency from bass to treble. Dynamic range is very wide. And the tone can "open up" quite a bit and give you "brilliance" if you really drive it to the "very loud" portion of the dynamic spectrum.Action/touch is nothing to sneeze at as well. Very even and consistent up and down the whole keyboard. Quick thrills and repeated notes were handled just fine. I would consider the touch as leaning more towards the "heavy" side of the spectrum. [For what it's worth, the Shigeru's touch is heavier than most new Steinways, new C-series Yamahas and a new Yamaha S6 I tried.]In general, I find it hard to find anything specific to knock the SK-5/6.End Note 1
Note 2:K.Kawai and Shigeru Kawai: Played some GE's, RX-1, RX-2, RX-3, RX-5, SK-3, SK-5, SK-6, RX-A. Everything starting from RX-2 is quite respectable. I played old Kawais a long time ago and didn't find them that interesting, but the new crop of RX's and Shigerus have really grabbed my attention (probably because they easily exceeded my rather low initial expectation). Not as bright as the Yamaha C-series, I find the new Kawai's tone much to my liking. The Kawai action is no sloth either. The Shigeru SK's are tonally much more refined than the RX's. Again, my preference for the "big piano tone," especially in the bass, steered me away from the RX-3/SK-3 and smaller pianos...I found very little difference between an SK-5 and an SK-6 except at the lower bass registers where sheer size really counts... The tone is slightly rounder and warmer than the RX-5, and very refined over all. Good clarity. Good sustain. Very wide dynamic range. Good, responsive action that veers very slightly to the heavy side. Ornate piano legs.The truth is, the SK-5 and SK-6 are, in my view, a little more refined than the RX-A, especially in the bass. But raw power was sacrificed to achieve this refinement, and, a bit like the [Mason and Hamlin] BB, the lower bass sounded a little weak when compared to the rest of the piano. The higher treble also sounded a little too dark for my taste.Overall, the Shigerus' warm, round tone does "open up" to brilliance as the volume increases; and the trajectory of the "openning up" is very natural and very predictable...End Note 2
Hi, Nemo, see https://www.kawaius.com/grandpianomodels.htm , I cannot find your RS-50, do you mean to say GS-50? That would be a 6'9" piano..
Yamaha is machine made. Shigeru takes a year to painstakingly be made by hand by craftsmen that make pianos for a living.