The SB-900 is an inexpensive and relatively compact subwoofer from the folks at Atlantic.  It's also one of their most popular models, but it's not optimal for everyone's setup.  To meet the needs of more home theater enthusiasts, Atlantic has created a down-firing version of the subwoofer which allows for far more options in placement.

Paradigm's latest subwoofers fall into the cheaper price range, but they still have a lot of technology that's trickled down from the high-end lines. Though the Monitor Series 7 subwoofers come in a few different sizes, they all share some common threads.  All three utilize an Ultra-Class D amplifier that's capable of 900 watts of peak power and 300 sustained.

The STS is an absolute monster.  It boasts an output capability of 130 dB at 20Hz and a 101 dB sensitivity.  It's not going to rob you of space though, since it comes in at just over 17 inches wide, and 36 inches deep.

You're not going to find another sub like this.  The MilleniaSub borrows its shape a bit from Wisdom Audio's SRS Suitcase Sub, but adds a whole level of style on top of that.  It's curved, sleek and comes in at 14 inches by 4.75 inches by 17.75 inches.

The SubSeries represents a new direction for PSB and, if the folks at PSB have their way, a new direction in subwoofer design period.