Subwoofers are huge, bulky and heavy for a reason – they need to be! Without weight holding a subwoofer speaker to the floor, the speaker moves and not the air. It’s like trying to mix cake batter without holding the bowl!
Sure if you want a subwoofer that you will neither see NOR hear, get this goofy product. But if you want to actually feel the bass, learn the physics before you make your next purchase.