You can connect using any regular old XLR mic cable, a TRS to XLR cable, or even a TRS to TRS cable.
Just set the Stereo/Mono switch on the P2 to mono and off you go. Granted, it’s still better than using the old conventional floor wedges, for obvious reasons: better control over stage volume and a personalized mix for each musician. If you’re using option 1 and running your IEM mix in mono, you’re missing out. I should also mention that everything described in this post applies equally to the Fischer Amps In Ear Stick, which the P2 is functionally identical to. This is way you would likely WANT to use the P2 if you’re using one of the many digital mixers and/or digital snakes on the market that allow you to stereo link a pair of output buses for a stereo IEM mix. Take a stereo linked output pair from your mixer and and send it to the P2 for a STEREO In Ear Monitor mix.This is the way you would likely connect your P2 if your mixer has one or more headphone outputs that you can assign a monitor mix to. Take a stereo unbalanced headphone feed from your mixer and send it to the P2 for a STEREO In Ear Monitor mix.This is the way you would likely connect your P2 if you’re still using an analog mixer, since the Aux/Monitor sends are almost always mono. Take a balanced mono Aux/Monitor send from your mixer and connect it to the P2 for a MONO In Ear Monitor mix.What this compact, flexible little gem allows you to do is this: A couple of years ago, Behringer released the Powerplay P2, a beltpack headphone/personal monitor amp that has opened up the world of In Ear Monitors to even the most budget-conscious musician.