Hi Runner
I have my KB main outs to a mixer(passive)along with my Digitech VR, and laptop. This is sent to a Rane EQ,into a Sonic Maximizer, and out to the Z2200.

Not only are the instruments clear as a bell, but the vocals are improved a great deal.

I am sure it has it's limitations, but run my system with a band in a 50 by 100 room at half volume.

Bernie
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact