Summary: My first experience with this sub was within the Energy Take 5.1 system. I wanted a small but full range set up in my study. I paired the Energy speakers with a 70 WPC Marantz receiver and 40" Samsung LCD, resulting in a great performing personal sized system. I purchased another one to pair with Energy's RC-10's and RC-Mini's in a larger room at our beach house - it holds its own with them as well.
Summary: This little sub provides more than enough bass for small to medium rooms, sounds great with music and movies. Don't expect this to shake the walls but for around $100 you shouldn't be expecting that. I have mine set up in a 15x15 room and it does an impressive job. Looks great and is discrete, you won't be disappointed.
Summary: This little 8" sub sounds great whether you're listening to music or watching movies. Smooth tones from jazz to classical to rock. It can shake the room and windows if you open it up. It has all the adjustments and inputs that you will need to match up to your system. I have it paired with a set of Definitive Tech speakers in the front, a Wharfdale center and rears and it fits right into the menagerie.
Summary: This is a small subwoofer and doesn't have a lot of power. It is good for adding some extra bass to a small, possibly medium-sized, room. This will not rattle the windows, but will give some extra thump.