Originally Posted by mdanderson
Very nice speakers Terry. I plan on getting an Auralex Great Gramma for my SVS PB12-plus. I live on the second floor of my apt and I don't want to take any chances with neighbors. I know turning the sub down will help the most.
Turning the sub down is the only thing that will help.
If your subwoofer's enclosure has a large amount of resonance--like, it dances around when you use it--then the Gramma can reduce that vibration's propagation through the floor.
I doubt that your very excellently designed and built subwoofer
has much cabinet resonance to speak of.
Gramma notwithstanding, your sub is going to shake the air; this air-shake is going to shake the walls. This wall-shake is going to reach adjacent walls.
I'm an apartment dweller so I feel your pain (and your hope) but there's no shortcut to being a good neighbor