Bang & Olufsen - BeoLab 4000 Diamond Black, Refurbished Streaming Ready Speaker set

Bang & Olufsen BeoLab 4000 in the stylish Diamond Black finish, fully revised and ready for direct streaming. One of the most versatile and compact active speaker systems from Bang & Olufsen, with the characteristic leaf-shaped design by David Lewis and a solid aluminum housing.
The BeoLab 4000 features two built-in amplifiers per speaker (bi-amplification) that independently drive the 11 cm woofer and the 1.9 cm dome tweeter. The thoughtful bass reflex system and Adaptive Bass Linearisation (ABL) technology ensure a surprisingly full, dynamic and tight soundscape that sounds considerably bigger than its size suggests.
Thanks to the integrated line-in (RCA/banana plug) connection, this set is fully streaming-ready: simply connect a Bluetooth adapter, Wi-Fi streamer or network player to stream directly all your favorite music from your phone, tablet or computer. In addition, the speakers can be seamlessly combined with classic and modern B&O installations via PowerLink.
Thanks to professional revision the system is technically in excellent condition and ready for many years of carefree listening pleasure.
Specifications
Type: active 2-way bi-amplified speaker set (Type 6636 / 6642)
Design: David Lewis
Amplifier technology: 2 x 59 W built-in amplifiers per speaker (Class AB)
Acoustic principle: bass reflex with optimized port
Frequency range (+4 dB / -8 dB): 55 Hz - 20,000 Hz
Maximum sound pressure level (SPL): 97 dB
Acoustic technology: Adaptive Bass Linearisation (ABL)
Woofer: 1 x 114 mm (4.5 inch)
Tweeter: 1 x 19 mm (0.75 inch) dome
Crossover frequency: 3,300 Hz
Connections: 2 x PowerLink, 1 x Phono/Line-in (RCA/banana plug)
Streaming functionality: suitable for direct connection of Bluetooth adapter or Wi‑Fi streamer via line-in
Placement options: freestanding, on stands or wall-mountable (horizontal/vertical)
Dimensions (W x H x D): 28 x 32 x 13 cm
Weight: approx. 6.0 kg per piece
Finish: Diamond Black (black anodized aluminum with black fabric covering)
Design: Bang & Olufsen (Struer, Denmark)
A timeless piece of Danish design that effortlessly brings together compact elegance, active bi-amp audio technology and modern streaming convenience.