Hi,
Yes, you're on the right track. And to address Micah's comment about the rubber feet, sure, the rubber feet help. The photo shows the subwoofer with the rubber feet resting on the riser. It's the combination of dissimilar materials that reduces transmitted mechanical vibration to the floor or shelf beneath the speaker, but not acoustically generated vibration elsewhere in the room or even in the same surfaces (the floor and shelf) resulting from the subwoofer or speaker's direct acoustical output.
Some suppression is desirable because you don't want spurious resonances in vibrating shelves, floors, and walls mixing in with the music or dialogue. It can be annoying and distracting; e.g. metal or wooden venetian blinds vibrating at certain frequencies at high playback levels.
The argument for allowing some vibration/resonances is that they contribute to the realism of a musical experience. The best example is a big pipe organ in a church. If you've experienced that, the wooden pew and floor (if it's wood) in the church will vibrate with very deep pipe organ pedal notes and you can feel those in the wooden pew and floor. The same thing occurs in concert halls with deep bass from a symphony orchestra, or even in a club/concert with powerful electric bass. So it's part of the experience, and if that's what you're trying to simulate or recreate at home, then some bass vibration in the floor/furniture is desirable.
By the way, the place where you do NOT want any resonances is in a shelf holding a turntable for vinyl playback or in tube amplifiers. Vibrations in a turntable or tube amp may be transmitted back to the platter/disc and cause feedback. Tubes may become microphonic and pick up mechanical or acoustically borne vibration.
Regards,
Alan
Regards,
Alan
