1st get the sub you want you dont have to turn it up all the way. i think if you use the isolation bar to float the ceiling on the studs and maybe a second layer of sheetrock you may tame the LFEs by a decent amt. but you have to remember your side walls are connected to the house as well so if they are not "floated" lfe will vibrate through them as well.**warning i am not an expert by any stretch this is based on things ive read while researching my ht.**
Jake

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Leave the gun, Take the canolis.