I don't know if it's the speakers themselves that people are concerned about, or simply the fact that transporting, hooking up and generally dealing with external monitor speakers is the concern with the Tyros. I think a lot of people who own, say a PSR2000, are used to a built-in speaker system they don't give a second thought to. Then again, the majority of Tyros buyers likely won't be transporting it that much... after all, this is the next generation of a home instrument. This is why I was interested in seeing if Yamaha plans to make a special carry case for the Tyros since Yamaha has just released a new line of cases for their pro keyboards. If they don't make a carry case especially for the Tyros, it may be that Yamaha didn't really design the Tyros to be anything more than a rec room instrument.
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Jim Eshleman