Bang en Olufsen Beolab 4500 - active speakers BeoLab 4500 is a wall speaker that is no more than 8 cm deep. It is a built-in (active) amplifier and expanded base reproduction, which uses the wall as a reflector. BeoLab 4500 design at base level. These active loudspeakers feature 2 power link connections to connect them to your existing B&O equipment. (use the 8 pin power links cables though due to the display) They also have an RCA (Tulip) connector to connect them to other equipment. Think of Apple Airplay, sonos or a Bluetooth receiver. On one speaker, a small disintegration of the protective fabric is visible. The metal parts are well preserved. Mirror surfaces are well preserved. The sound is very nice. Their design is perfect.