For Attention Screen's Merkin Hall concert -- see http://www.stereophile.com/news/021207merkin/ -- I set up behind the door on stage right, monitoring a 2-channel mixdown of the 10 mike channels on closed-back Sony MDR-7506 headphones. The two Metric Halo mike preamp-ADCs sit on top of a flight case holding my Alesis Masterlink hard-disk recorder, which was being used for backup.