Im sure you're exhausted from answering this question. I checked the searches and Im still confused. Balanced, Unbalanced, XLR, TRS, 1/4" conductor?????Blah,blah,blah.. Im entering the whole preamp-poweramp gauntlet. I just got my new power amp QSC PLX1804. Afriend lent me an old preamp to use while I decide on one of my own. His is an old ART Parametric Tube EQ. He says it will work for now even though its not a straight up Bass Preamp. I just want to know how to connect the dam thing to the QSC. Its got an unbalanced 1/4" output or a balanced XLR output. Each channel on the QSC has an XLR or a 1/4" input. What do I do? One music store employee told me to connect the balanced XLR on the Preamp to channel one XLR on the QSC, then use a TRS cable to connect the 1/4" inputs on each channel on the QSC to "bridge" them. ?? Another employee told me all I need is this adapter cable he showed me which has an 1-XLRfemale at one end and 2-XLR males at the other. Im supposed to connect the female end to the pre and the 2 male ends into each channel on the power amp? I feel that when Im done with all this power/preamp runaround I will be a certified engineer.