Idatrod said:
"I also played the KN7000 briefly and the Volume output on it is OUTSTANDING! Much better sound through the speakers".

Well, the test to do now is comparing both keyboards listening them through external amplifier and loudspeakers. Perhaps there is not a great difference.

It is the same with Tyros. Someone said here that Tyros and PSR200, listened at external amplifier and loudspeakers, doesn't sound too much different.
Cheers