Bang & Olufsen BEOLAB 4000 Black Speakers

Used but in very good working condition. One speaker has very small textil tear in the cover. You can see it only when you get very close. This is a high end speakers made in Denmark. You can play any music just with any 3.5mm stereo jack device. Or you can buy Bluetooth adapter and connect your phone. Active loudspeaker The equation used to be a simple one; the louder the sound, the bigger the loudspeaker – but not anymore. Placing the amplifier directly into the loudspeaker allows us to reduce the overall size of the BeoLab 4000 to one third of a conventional loudspeaker with the same sound capacity. Adaptive Bass Linearisation Adaptive Bass Linearisation (ABL) is a process patented by B&O and is incorporated in BeoLab loudspeakers. The idea is to use the surplus capacity in amplifiers and driver units, arising by normal listening levels, for a bass extension – a sound reproduction with more bass, than the loudspeaker otherwise would be able to produce. The function is adaptive. This means that the loudspeaker adapts to the signal it receives. Loudspeaker drivers are therefore fully exploited, without suffering mechanical or electronic abuse, and the built in amplifiers are not subjected to signals would otherwise create an overload situation. ABL gives stunning bass reproduction considering the size of the loudspeaker in which it is incorporated, under normal listening levels. Aluminium Aluminium is the perfect material for BeoLab 4000. It’s light, but offers an impressive stiffness despite a thickness of only a few millimetres. It also makes it easier to obtain the loudspeaker’s unique curved form, which is important for avoiding problems with audible artefacts due to internal standing waves in the cabinet