which specific model Passport Monitor?
Thanks for the reply.
You are right - they are the 150W Fender Passport 5" Portable Studio Monitors.
From the manual: BALANCED INPUTS — These jacks can be used to input balanced signals using 1/4" TRS (Tip-Ring-Sleeve) plugs where Tip=Positive, Ring=Negative and Sleeve=Ground.
I can't find anything in the GP-10 manual that explains the options/limitations of the L/R Output in terms of cables that can be used.Thanks for your input. Most helpful. :-)