Bang and Olufsen Penta 3 Type 6631. This is the last and best model B&O produced of this exquisite active speaker. Amp is  rated at 281 watts .Frequency response is 39Hz-20 KHz.

Beolab Penta 3

Type no; year intro; last sold:
6631 1991 05-2000
AUS 6635 1991 05-2000
GB 6632 1991 05-2000
J 6634 1991 05-2000
USA 6633 1991 05-2000

Dimensions W x H x D/Weight: 22 x 165 x 34cm / 12kg
Cabinet finish: Stainless steel

Power consumption
Typical 24 watts/stand-by < 2.5 watts Mains 6630 KOR 120V 6631 EU 230V 6632 GB 230V 6633 USA-CDN 120V 6634 J 100V 6635 AUS 240V Maximum sound pressure level (stereo, pair) 103 dB Power amplifier modules 1 unit Long-term maximum output power per module* 281 watts Effective frequency range* 39 - 20,000 Hz Cabinet principle Bass Reflex Magnetic shielded No Woofer 4 x 13 cm Midrange 4 x 8 cm Tweeter 2.5 cm Net volume 32 litres Bass equalizer Switch 0 dB, -3 dB, +6 dB *According to IEC 268-3 and 268-5 Connections: Power Link 2 Phono (line) 1 Speaker Link Most recent S/W 1.1 Sadly I only have one available. It is in excellent working condition