You can run at Boost 11 as long as you don't crank up the keyboard too loud--should be OK.

As for the green plug, I suspect you've found a better inpedience match.

Keep up updated, and let us know how your band likes the system.

Cheers,

Gary

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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)