I use one of these: http://www.amazon.com/3-5mm-Stereo-Extension-Control-Switch/dp/B004GIFBM4/ref=sr_1_48?ie=UTF8&qid=1437116073&sr=8-48&keywords=headphone+volume . I put an earbud in one ear to listen to myself from the phone out and control the volume with that - my other ear I listen to the stage monitors to hear the rest of the band. Works great.