17 in - 19.9 in Separate Speakers

The Bottom Line: KEF's HTB2 subwoofer combines sleek style and high performance.

Specs: subwoofer, 17.3 in x 7.7 in x 15.4 in, High-gloss silver, Active, 110 dB

The Bottom Line: KEF's HTB2 subwoofer combines sleek style and high performance.

Specs: subwoofer, 17.3 in x 7.7 in x 15.4 in, High-gloss black, Active, 110 dB

The Bottom Line: Capable of producing better bass than its single-speaker competition, the Zvox 325 is a solid choice for faux-surround sound on music and movies.

Specs: 17 in x 17 in x 5 in, Active

The Bottom Line: Zvox's "sound console" is a virtual home-theater speaker system in a box.

Specs: 17 in x 15 in x 4.5 in, Black, Active

The Bottom Line: This full-size center-channel speaker sounds good with both movies and music and blends well with Polk's other Monitor Series speakers.

Specs: center channel speaker, 18 in x 9.6 in x 7 in, 2-way Passive, 8 Ohm, 89 dB

The Bottom Line: Aperion's three-way center speaker sounds great, even for listeners sitting off to the sides.

Specs: center channel speaker, 19 in x 8 in x 7.3 in, Cherry, 3-way Passive, 6/8 Ohm, 88 dB

Specs: center channel speaker, 17.3 in x 5.2 in x 3.7 in, 2-way Passive, 6 Ohm, 86 dB

Specs: subwoofer, 17.1 in x 13.8 in x 5.9 in, Black, Active, 12 KOhm, 75 Watt

Specs: 19.3 in x 8 in x 7.3 in, Medium cherry, 3-way Passive, 6 Ohm, 86 dB

Specs: subwoofer, 17 in x 14 in x 18.5 in, Black, Active, 90 dB, 200 Watt