If you want it to shake the house, it should do so, when appropriate, via the acoustical output, not via physical transmission from the sub enclosure to the floor.
OTOH, I do not want the sounds of my room or its contents contributing to the sound of the performance. Thus, either way, isolation devices can help.
Kal
OTOH, I do not want the sounds of my room or its contents contributing to the sound of the performance. Thus, either way, isolation devices can help.
Kal