I've been using the 1/4" jacks on my guitar, zoom setup to our old mixer for a little while now and everything worked ok.(it only had 1/4" mic and line in jacks) Now our band has upgraded the mixer to a Makie DFX-12. The Makie has 1/4" and XLR. I just purchased a Boss GT-6B. It has 1/4" and XLR. Should I be cabling from my XLR on the GT-6B to the XLR on the Makie? If so, Why does the manual say to connect line level instruments such as guitar effects and direct boxes to the mono or stereo LINE IN 1/4" TRS? And if phantom power is turned on "globally" on the first 4 mono channels XLR's will this mess up my GT-6B? Should I only use a stereo XLR channel that has no phantom power to it?