Subwoofer can be heard all over the house even when its at a low volume?

Question

I have a 2.1 system in my room but the bass from the sub can be heard downstairs even when its not on loud(Its only a 20watt sub from the Logitech x-230 system). Is there a way I can stop the sound and vibrations from being heard downstairs.

Answer 1

If the sub is on the floor, isolate it from the floor by putting a folded blanket or foam rubber under it.

Answer 2

turn the bass off.  or close to it if you have an eq. The db level is higher than the  high end noise so it carries farther. might try covering it with a blanket