I am living in an apartment on 2nd floor and I am wanting to get a sub. for my HT. However, I am concerned that the vibration and sound of the sub. will lead to complains from my downstairs neighbor. Is there anything I can use that will cut down on the vibration or sound from Sub. from travelling downstairs? Will using those Sorbothane isolation pods (if they can handle the weight of the sub), or Air Mass isolation platform? Acoustical dumping sheets? How about those dynamat that used on car? Any help will be highly appreciated! thanks!