Wow... here it is June of 2010 and they still haven't changed their user manual to include that very important piece of information that Sandman has given us. I assumed that the Stereo jack was a TRS and I could just use a TRS - Y cable and split it. Sad part is that I called Gibson to verfy this and they said that I could do exactly that. Here is my current problem. If I am just using the "mono" channel and set the blend to the nanomag p/u only, then I am getting an extremely weak signal.
Any ideas.. (not that it should matter but this is on the new DR-500MCE guitar, not and EJ200CE)