A subwoofer is a dedicated low-frequency speaker cabinet that fills in the deep, rich bass that is not expressed through most main speakers. Subwoofers are specialised, and can't reproduce midrange or high frequencies. They are designed to reproduce the deepest notes in the musical spectrum, and low frequency sounds provided by home theatre soundtracks.
Most main speakers are passive (unamplified), however most subwoofers include a power amplifier, creating the power needed to generate the deep bass tones. A quality subwoofer allows your amplifier and main speakers to work more efficiently, with less distortion. All kinds of instruments, including voices, can be heard clearer.
The Jamo SUB210 is a 200W active subwoofer with a strong 8 inch driver. It is ideal for home theatres and audio listening rooms. More compact than any of the predecessors in its class, it offers easy placement in any living environment. The 200W amplifier and a long-throw 8" woofer in a bass-reflex-enclosure give this sub a level of performance unequalled in its class. The auto-on-off switch and controls for level, cut-off-frequency as well as phase, together with line-level input make it very easy to integrate this subwoofer with any other TV/speaker/amplifier/receiver combination.
With a height of 31cm, a width of 28cm, a depth of 30cm and weighing about 7.5 kgs, this compact sub is an excellent accompaniment to your current speaker set up.