This is a slightly (as in twice by me) used Presonus HP4 Headphone amplifier.
You can use this unit to amplify up to four sets of headphones at the same time. It's great for monitoring live recordings. There are four individual volume controls, so everyone can listen comfortably.
I purchased it a couple years ago, when my band was trying to record some songs. We ended up in over our heads, and decided to go to a professional studio instead... So, I'm selling this unit in the hopes that someone else will get more use out of it.
I'm 95% sure I have the power supply for this unit. However, right now, I'm 100% sure I don't know exactly where it is. I'm going to look for it tonight, I will update the listing when/if I find the power supply.
