Rolandfan,
Have you listened to this keyboard in person ?

This was one of the worst arranger I have ever heard in my life (besides the real cheap CASIOS and Yamahas).

I listened to the onboard speaker and I said yuck !!

Some here said it sounds lots better thru amplified sound system.

Night and day compared to the Yamaha PSR550, PSR1000 and PSR2000. I did not explore all the sounds but the piano, bass and drums were really embarrassingly terrible coming out of the internal speakers.