The PreSonus HD7 is a pair of over-ear semi-open headphones designed to provide high-quality audio in a durable design. These headphones feature 50mm neodymium drivers as well as precision-tuned acoustic chambers to deliver crisp, detailed audio within a wide frequency response. Indeed, the headphones extend from 10 Hz to 30 kHz. The rugged construction can withstand the rigors of professional use.