Presonus HP60 headphone mixing systemIntroducing the Presonus HP60 headphone mixing system The HP60 is a 6 channel headphone mixer that makes distributing a headphone mix to musicians in the studio effortless. No more "Turn my headphones up!" or "Turn down that click!", even the most particular of musicians will be impressed with the mix and level of control offered by the HP60. This is more than just half a dozen headphone amps; it's a field tested, easy to use solution to a host of