I wonder if such idea could be beneficial for woofer design? What if you make down firing woofer suspended in air and have the cabinet/housing vibrate instead?
https://www.dropbox.com/s/sq132je3zzrnt1o/floatingback.mp4?dl=0
https://www.dropbox.com/s/sq132je3zzrnt1o/floatingback.mp4?dl=0