Evangelical,
Hmmm, I'm not sure about the back of the 9k anymore. The Tyros has (if one is going to try to use the subwoofer and satellites out) a din plug and a 1/4" from the board to the subwoofer, then there are to 1/4" outs L&R to the satellites.

So I was speaking of trying to use the existing setup to the speakers out and leaving the mains open. In my setup, my mains are going to my recorder and I do not want to have to keep plugging and unplugging things and is why I am using the Tyros speaker out setup.

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jam on,
Terry
http://imjazzed.homestead.com/Index.html