Has anyone ever seen anything like this before?
SubPac is “a high-fidelity portable tactile audio device that quietly and directly transfers low frequencies to your body,” says the company’s website. “Feel the boom of a kick drum, the warmth of an 808, the organic expression of a bassist, and the richness of soundscapes.”
“Through a specially developed backpack system, the SubPac quietly and directly channels all bass frequencies (from 5-130Hz) through your body, allowing you to literally feel the bass rather than necessarily blow seven shades of s**t out of your ear drums.”
It's intriguing at the very least.