PreSonus HD9 Closed Cup Professional Headphones 100789372 these Shock Racks also include

these Shock Racks also include 8 elastomeric shock absorbers which allow for a standard payload range of 40 to 150 lbs (optional extended payload range of 160 to 300 lbs can be accommodated as a special order option)

and an automatic ambient pressure equalization valve (MIL-STD-648C) all contribute to their military grade design

Mac systems require a Mac Pro computer with PCI Express slots

All labels transfer across linked systems

the beltpack can be configured to blink the light or keep the light on for assigned channels

PreSonus HD9 Closed Cup Professional Headphones 100789372 these Shock Racks also includePreSonus HD9 Closed Cup Professional Headphones When you need to do serious work without bothering anyone in your living space and without being distracted by outside sound, choose PreSonus HD9 headphones. They're clean sounding, extra comfortable, and offer a broad, transparent frequency response that ensures accurate mixing. The HD9s closed back acoustic design provides superior listening isolation and reduces headphone bleed, so you hear nothing