Trigger cables are 3.5mm headphone cables. Male to male... I am not using Trigger cables on my EP-600's due to the amps in the subs not turning on like they are suppose to... You may have better luck than myself... For a further explanation on what i am talking about read the below thread. Yes, you can buy a Y splitter, or 2 Y splitters if you would like to get 3 trigger cables off of one "trigger" on your Denon.