Bill made a good point about the hammer action being unsuitable for other sounds.
I agree wholeheartedly.
The PA-588 wouldn't be my choice as an arranger...I like the 61-note light action on my S900...Piano is only one of the many sounds I use and when in arranger mode, 5 octaves work just fine for me.
Still, the PA-588 will find it's niche and garner many followers.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.