Beolab 4000 active speakers excellent working condition. These powerful little Loud Speakers not only look gorgeous but sound incredible. Extremely versatile they can be mounted in many different ways: placed on a shelf, hung, at almost any angle, from the wall or ceiling (optional, not included). With crisp highs and deep lows, they have an incredibly balanced sound and will perform at any volume. Specifications Type: 2 way, 2 driver loudspeaker system Frequency Response: 55Hz to 20kHz Crossover Frequency: 3300Hz Sensitivity: 97dB Midbass: 1 x 114mm Tweeter: 1 x 18mm Enclosure: 4 litre, bass reflex Grille: Black Finish: Black Dimensions: 280 x 320 x 160mm Weight: 5.7kg Note: 52W power amplifier