Hi Chuck and others.
That's the way to do it - are no possibilities of connecting speaker directly to the 7000.
I myself use a stereo amp., through which I send the keyboard together with my piano and my beautiful voice
Then it all comes out through two FBT speakers at the top and one subwoofer - and most people say, it sounds great - except from the voice
Nice day to everyone and musical regards
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Solomusikeren