Hmmm....I don't have personal experience with the LFM-1, my sub is almost 10 years old now....PSB subsonic 3(front firing 12" woofer, 180watts, two rear ports, no bypass)and run it at 80hz x-over thru my 1050, Ascend CBM-170's set to small. If anything, I may have gotten acustomed to the sound, but don't think there's not enough bass. Maybe it's the clearance between the sub and the carpet or the proximty of the sub to the room boundaries which have a dramatic affect on sub response.