Without knowing more about your requirement, I can't see any reason to use a MIDI link. I would suggest you just connect the Line Outs direct to your PA System....

I'm intrigued as to your application for 2 x KN7000.... Do Tell
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)