Tried WK1630 thru the sound system tonight. We have excellent pro sound system BTW.

I was disappointed. The sounds were not clear and crisp as Yamaha PSR1000 or the KORG PA80. Not even close. It was "murky".

However, as I mentioned the sounds coming from the internal speaker is the best from all the arrangers (high end also) I have seen at GC.

This baby is going back to the store for sure. Next is the CTK671 !!