Lets the band members hear each other.
This pack includes the Presonus HP4 Headphone Amp and two AKG K99 Headphones.
Presonus HP4 Discrete 4-Channel Headphone Amp
The PreSonus HP4 Discrete 4-Channel Headphone Amp features 4 headphone outputs on the front panel, each with its own volume, and 150mW of amplification per channel—extremely loud output with a low -98dB noise floor. It also allows control over monitors with a separate volume knob that can be muted using the Monitor Mute button. Its accepts balanced/unbalanced inputs and outputs (1/4" TRS)and is sized at 1/3 rackspace. Input can either be set to stereo or mono (the mono selector button on the front channel simply copies both inputs to both sides). Powered by an external wall-mounted supply.
The K99 headphones are semi-open and offer you excellent stereo sound at an optimum price. Self-adjusting headband, and low weight ensure pleasant fit. Large, high-performance 1.6-inch (40-mm) speakers provide natural, uncolored sound.
AKG K99s are perfect for listening enjoyment. K99 headphones include comfortable leatherette earpads that allow comfortable extended wear. You get a very accurate listening experience, thanks to an 18Hz-22kHz frequency range. AKG makes great headphones for a variety of applications, from studio monitoring to home listening. If you want to plug into a computer, CD player, or MP3 player and experience great sound, then these headphones are perfect for you.