10 in - 10.9 in Separate Speakers

The Bottom Line: If you don't mind its uninspired aesthetics, the Definitive Technology ProSub 800 is a mighty little subwoofer and a fine match for its SSA soundbars and ProCinema satellite speakers.

Specs: subwoofer, 10.3 in x 15.7 in x 12.9 in, Active, 300 Watt

The Bottom Line: This big Aperion Intimus 633-T speaker makes the sort of full-size sound that satellite/subwoofer-based systems can only dream about.

Specs: floor-standing, 10.2 in x 18.3 in x 41.5 in, Medium cherry, 2-way Passive, 6 Ohm, 90 dB

The Bottom Line: If you have the room to indulge your home-theater fantasies on a grand scale, Infinity's Beta towers merit serious consideration.

Specs: floor-standing, 10.4 in x 14.6 in x 41.3 in, Cherry, 3-way, 8 Ohm, 91 dB

The Bottom Line: If you have the room to indulge your home-theater fantasies on a grand scale, Infinity's Beta towers merit serious consideration.

Specs: floor-standing, 10.4 in x 14.6 in x 41.3 in, Black, 3-way Passive, 8 Ohm, 91 dB

The Bottom Line: Hsu Research's most affordable subwoofer sings with micro satellites.

Specs: subwoofer, 10 in x 16 in x 19 in, Active, 150 Watt

The Bottom Line: This baby sub generates grown-up bass.

Specs: subwoofer, 10 in x 17.9 in x 16 in, Black ash, Active, 100 Watt

The Bottom Line: An almost ideal balance of characteristics for a surround speaker.

Specs: left / right rear channel speakers, 10 in x 6.5 in x 17.5 in, 2-way Passive, 4 Ohm

Specs: subwoofer, 10.8 in x 16.9 in x 18.6 in, Active, 20 KOhm

Specs: subwoofer, 10.2 in x 13 in x 10.6 in, Active, 1000 Watt

Specs: floor-standing, 10.2 in x 15 in x 42.2 in, Cherry, 4-way Passive, 8 Ohm, 91 dB, 125 Watt