I think if you are asking whether the sub will rattle the window glass then you might consider using Marigoaudio.com VTS Tuning Dots on the windows.
You will hear better sound throughout the full audio range, even before you add the subwoofer.
For the support foundation beneath your subwoofer there will be many suggestions which are found in archived Audiogon discussion threads.
One of the simplest - place Herbiesaudiolab.com "Big Fat Black Dots" between the bottom of the sub and the top of a granite tile or tiles resting directly on the carpet.
If the carpet pile is not flat enough to permit that idea then consider one of the many carpet-piercing cone type footers.
Personally prefer to flatten a rug rather than piercing it. Don't care much for tattoos either :>)
You will hear better sound throughout the full audio range, even before you add the subwoofer.
For the support foundation beneath your subwoofer there will be many suggestions which are found in archived Audiogon discussion threads.
One of the simplest - place Herbiesaudiolab.com "Big Fat Black Dots" between the bottom of the sub and the top of a granite tile or tiles resting directly on the carpet.
If the carpet pile is not flat enough to permit that idea then consider one of the many carpet-piercing cone type footers.
Personally prefer to flatten a rug rather than piercing it. Don't care much for tattoos either :>)