[dylan604]

no, you're missing the point. the subwoofer is not connect to a wall that vibrates, so it wouldn't miss the signal. the surround speakers and possibly the front and surround speakers tend to be attached to a wall. The floor doesn't shake enough for the sub to loose alignment is the point.

[simoncion]

Well, (to treat this seriously, rather than the joke it was) where's your transmitter? And are there vibration-sensitive components inside of either the transmitter or receiver? Several times a month, cars idle outside my apartment with bass loud enough to severely shake my windows, and somewhat shake my walls and floor. I imagine a receiver that's physically attached (or merely very near) to a subwoofer that loud would have trouble maintaining a steady optical link.

[ragebol]

I was making a joke though.

Also, if you bounce the signal off a mirror on the wall like DIY Perks did, then walls vibrating even a little bit will be an issue if the beam is narrow enough.