Mesa tech support is closed for the week and I'm hoping to get this answered so I can try it this weekend. I have a V-Twin which appears to have a mono-out to Power Amp and the Mesa Stereo 50/50 requires both channel a & b to be driven for full output unlike my previous Tubeworks MosValve 962 which would drive both channels with only channel a input being driven. I see the headphone output is stereo but I was wondering is there a proper way to hook this up; V-Twin to Mesa Stereo 50/50? Thanks in advance for any assistance. :?