I've never had a problem of blasting out one of my ears, but that could be just me.Lawrence wrote: I agree about not tuning out the room as you prepare the next song, but using only one side of the headphones requires you to blast the headphones so you can hear the headphone ear over the room music. Most professional DJ mixing boards (even the cheap ones) have a cross-fader on the headphones so you can check what is being played against what you are cueing up while you are cueing it up. (It applies just to the headphones; seperate from the cross-fader that goes to the amplifier). They are used mostly by beat-matching techno DJs, and thus are on almost all mixing boards.
The way a song sounds in a room is drastically different than the mixing board. Things that sound fine on the board might need a little more finess when it's live. If you cut yourself out of the live room you have no way of telling when something is hot or needs a little more gain. That's why I never cut my self off from the live room.