PreSonus HD9/HP4PACK Four-Person Headphone Monitoring Bundle 15 Inch Subwoofers Polypropylene Cone: Provides the woofer's

Polypropylene Cone: Provides the woofer's primary sound-producing diaphragm

with 50 watts x 4 maximum output

Built-In Garmin Navigation: Provides onboard GPS guidance with Lane Assist for approaching turns and exits

40 cubic feet gross internal volume

PreSonus HD9/HP4PACK Four-Person Headphone Monitoring Bundle 15 Inch Subwoofers Polypropylene Cone: Provides the woofer'sThe PreSonus HD9 HP4PACK is a studio headphone monitoring bundle built for sessions where up to four people need to hear the same source. It combines one HP4 four channel headphone distribution amplifier with four HD9 closed back monitoring headphones. This setup helps musicians, producers, podcasters, and recording guests monitor together without relying on a single headphone output. The HP4 accepts a stereo line level source from compatible mixers,