Hello all, I have a rack with 3 Marcrotech 2400 amps. Typically we only use two of them, splitting the signal with an XLR Y cable. We are powering 2 18" Subs per amp. I would like to add a single XLR patch to the back of the rack case and parallel the signal to all three of the amps. Is there a way to accomplish this without purchasing some sort of splitter? Can I build a Y cable that runs to three amps? thanks!