Bower & Wilkins - AS1 Active Compact Powered Subwoofer speaker set

The B&W AS1 Bowers & Wilkins is an extremely compact, active subwoofer designed specifically to provide hi-fi and cinema setups with a musical low end. This model was frequently paired with the Leisure Monitor series (such as the B&W VM1 or LM1). Thanks to B&W's well-known Flowport technology, it delivers surprisingly tight and detailed bass for its modest size, without the enclosure dominating the room. A handy extra is the control on the top surface that lets the playback be optimally tuned for films or music

Specifications:
Power Output: 85 Watts continuous power
Frequency Range: 27 Hz – 100 Hz (-6 dB)

The subwoofer works perfectly.
For a better impression see photos