I too could not find a mono plug... that is likely part of my problem!
I've got an Axiom XLR cable w/ 12v trigger line for my EP500 that uses a 3.5 mm STEREO plug (2 insulator rings). A mono plug would only have a single insulator ring.
Of course, I don't have it connected anymore. I was blowing the low volt fuses on the EP500 at an alarming rate. Something to do with voltage incompatibility between the XLR connections on the EP500 and my Emotiva pre-pro. Have only blown one fuse in the last year since disconnecting the 12v trigger line. So now I have to get off my duff and turn the sub off an on by hand.
Scott
