Enclosed in 1U rackmount housing, the PreSonus HP60 6-channel headphone amplifier sports two primary line-level stereo outputs routed to all six headphone outputs, which will give musicians the chance to hear more of what they want -- whether that be themselves, the click track, the bass line, or something totally different. A talkback feature with master level control makes sure that you're always heard, so no more yelling over noodling guitarists when direction needs to be given.