Summary: I'm quite surprised at some of the high reviews on here. Yes this is an entry level speaker, but its sound is poor. Punchy, weak, and it rattles with a paper speaker. I sent it back, paid just a little more for the JBL ES15P 10', and the difference is remarkable. The JBL is built better, sounds insanely better, and is even wireless! Go with the JBL.
Summary: I bought this sub to replace an older Boston Accoustics Sub for a 12'x14' room. Not a lot of wattage, so it may be insufficient for larger rooms. I find using a gain setting just over halfway works best for my room. I set thwe crossover to the max setting and let my receiver's Audessey (mic) do the rest. Sound is crisp and not boomy. Brings my satellites to life. Unobtrusive size, attractive design. Fits well in smaller rooms without taking up a lot of space.
Summary: I picked up this subwoofer to replace an old Boston Acoustic subwoofer, utilized in a small room, roughly 12 x 12. Was on sale at Sears for $149.99. For my room, this unit packs a big wallop, even with lower wattage. You may have to set the gain up higher than more powerful units, but even so, the bass is clean, and not boomy. It won't induce chest compressions, but really compliments the satellite speakers in the room. Attractive design.
Pros: large speaker, small foot print, great for smaller rooms
Summary: I have had several sub woofers over the years. A bad one will muddy up the bass - this one --- clean crisp sound. One can not go by 'watts' - it is how the components are matched that makes the real difference. Some very high end product spend their expertise on quality components rather than ridiculous 'watt' claims. This is a real nice product - wonderful sound.
Summary: This replaced a 14 year old Sony Sub-woofer. Price wise it was a good deal and not that much more expensive than the old Sony - The sound is terrific and easy to adjust to my taste in listening! The size is much nicer than the old Sony and not nearly as much space taken up in my small man-cave!
Summary: Purchased this 10" energy sub to replace my 8" energy and it sounds out of this world, bought it for about a third of it's original price (floor model). Subwoofer was like new, just a very minor scuff on the side. It sounds exceptionally good, the thundering bass O it's awesome. I recieved it in just a few days just like amazon said I would. Would highly recommend Energy products to anyone.
Summary: I actually own the Klipsch-branded version of this sub, (KW-100) but it's the same exact unit. Hooked up to a Sony STR-DG920 receiver, along with a pair of Polk Monitor 60's, Polk CS1 center and four small Sony surrounds. Sub connected to the AVR in LFE configuration. Crossover set to 120Hz (max) so AVR manages the actual crossover. Sounds blasted amazing. You don't actually hear this sub, you FEEL it. Movies and games are amazing and music also sounds great.
Summary: Yo- Very efficient sub woofer - in "Auto" mode it sleeps until the amplifier sends it a signal. I have mine backing up a Yamaha YSP-4000 Sound Bar and it is a perfect match for my listening room size (13 x 19). The sound is very smooth and blends in with the Sound Bar to give a really performance. Concerts are particularly good with this system and the sound is simply awesome.