Perhaps this is well known...I dont know...It's new to me so I thought I might share. For in home practice I am using a headphone amp with my bass and mix coming thru my PA mixer to headphones..so I was messing around today. I have a long(20ft) headphone cable with a small mp3 player adapter...SOOoo...I got out my earbuds hooked it all up to an empty channel on my headphone amp and...Wa La! In ear monitors. I can control the sound level of the mix at the headphone amp. Just needing a mix feed from the mixer to the headphone amp and I believe I am good to go. Disregard this if it appears I have "discovered" the wheel or something like that! Ha! Sort of excited! Thanks...Peace!