Make sure you review the measurements twice before ordering this bad boy cuz it's like having a little refrigerator in your living room! All the let me tell you this thing delivers. It literally rattles pictures on the complete opposite end of the house. The only problem now is I have to run around with Dynamat to get the house to be quiet. Quite the fun problem to have for sure. It delivers way below 20 Hertz for sure. In my humble opinion I think a double sub and one cabinet reduces dead zones versus having phase issues no matter what if you have two separate ones. If you've got the space in your living room for this monster I absolutely highly recommend you grab it. As a bonus it is quite satisfying at low volumes as well

I have two of them Monoprice M12 with medium sized room and there they are incredible I picked the subwoofers because I thought they would be excellent for music and home theater and it wasn't going to suck all the electricity out of the wall the performance you get out of these subwoofers is well worth every penny you won't look back.

Haven?t really pushed this sub to what it can do, but so far I?ve been really impressed. May snag another one.