PreSonus HD9/HP4PACK Four-Person Headphone Monitoring Bundle 15 Inch Subwoofers These options provide flexibility for

These options provide flexibility for systems using conventional speakers

with 50 watts x 4 maximum output

40 cubic feet gross internal volume

The woofers use waterproof polypropylene cones with thermoplastic-elastomer surrounds

8 wideband speech support is designed to improve call clarity

PreSonus HD9/HP4PACK Four-Person Headphone Monitoring Bundle 15 Inch Subwoofers These options provide flexibility forThe 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,