Wow!\nYou must listen much louder than I do!\nHow many dB do you require before the output begins to matter?\nAlso curious what sub(s) you are using!\n\nAs I posted earlier, I think 15" is generally the sweet spot for subs, but I don't feel like a sealed 12" is lacking in the least in a room like my guest bedroom (about 12 X 15).\nThe lower the frequency the louder it needs to be in order to be heard or in the case of below 20ish hz, felt. It takes a lot dbs to be able to feel sub 20hz output. A lot more than a small sealed sub can produce in average size spaces. \nI have a PC12+ and a Deftech not so supercube 8000 in a 1600 cubic ft room that is or can be sealed pretty well. It's has windows, double pane glass which is pretty decent. I listen at around -15 for most action type movies.