Dampening subwoofer vibrations

Hey all...

I'm not sure if this is the right board for this question, but anyway:

I have a rather large sub on my 5.1 setup (Z5500), and I'm worried it's going to piss off whoever's living on the floor below me next year (we have very thin floors). Is there any way that I can still use it at night (at reasonable levels of course), and cause minimal disturbance to a sleeping person below?

Turn the bass all the way down or invest in some headphones for nighttime use.