Bang & Olufsen Beolab 600 (1986)

Name: Bang & Olufsen Beolab 600
Brand: Bang & Olufsen

The Bang & Olufsen Beolab 600 is a landmark in high-fidelity audio design, representing the Danish company’s unwavering commitment to aesthetic elegance, technical innovation, and acoustic excellence. Introduced in 1986, the Beolab 600 was part of B&O’s premium Beolab series, which focused on active loudspeaker systems—speakers with built-in amplification tailored precisely to the drivers. This integration allowed for superior control over sound reproduction, a hallmark of B&O’s engineering philosophy.

Design and Aesthetics

The Beolab 600 stands out immediately for its striking, minimalist design. Crafted from high-quality aluminum and available in finishes such as silver anodized or black lacquer, the speaker exudes a futuristic, almost architectural presence. Its tall, slender profile—measuring approximately 105 cm (41 inches) in height—gives it a commanding yet elegant stance in any room. The cabinet is sealed and internally braced to minimize resonance, contributing to clean, accurate sound.

One of the most distinctive features is the driver arrangement. The Beolab 600 uses a vertically aligned coaxial configuration, where the tweeter is positioned at the center of the midrange cone. This coaxial design ensures that high and mid frequencies originate from the same point in space, improving stereo imaging and creating a more cohesive soundstage. The drivers are protected behind a removable fabric grille, maintaining the speaker’s sleek appearance while allowing for easy cleaning.

The base includes adjustable spikes for leveling on uneven surfaces, and the entire unit is designed for floor-standing placement, ideally positioned away from walls to optimize acoustic performance.

Technical Specifications and Active Electronics

Unlike conventional passive speakers, the Beolab 600 is an active system, meaning each speaker contains its own dedicated amplifiers. Each cabinet houses two amplifiers: one for the midrange and one for the tweeter, with a total system power output of 150 watts per speaker (300 watts total for a stereo pair). The amplifiers are of B&O’s proprietary design, known for low distortion and high damping factor, ensuring tight control over the speaker cones.

The internal crossover network is active and electronic, operating at line level before amplification. This allows for much steeper and more precise filtering than passive crossovers, reducing intermodulation distortion and improving driver integration. The crossover frequency is set around 3 kHz, a point carefully chosen to optimize the coaxial driver’s performance.

The bass response is handled by a separate, downward-firing 25 cm (10-inch) woofer located in the base of each speaker. This woofer operates in a sealed enclosure and is also actively driven, with its own amplifier channel. The downward-firing design allows the floor to act as an extension of the speaker baffle, enhancing bass coupling and smoothness. A ported chamber beneath the woofer helps tune the low-frequency response, delivering extended bass down to around 35 Hz.

Each Beolab 600 is bi-amplified for the mid/tweeter section and includes a third amplifier channel for the woofer, making it effectively tri-amplified per speaker. The amplification is powered by a switched-mode power supply, which was advanced for its time, offering high efficiency and stable performance under varying loads.

Connectivity and Integration

The Beolab 600 was designed to work within Bang & Olufsen’s ecosystem of audio components. It features dedicated input terminals on the rear panel for connection to B&O preamplifiers or control units such as the Beomaster 6000 or Beovision systems. The input is via a proprietary 5-pin DIN connector, which carries both audio signals and power control data. This allowed the speakers to be turned on and off automatically in sync with the source component—a sophisticated feature for the 1980s.

Due to this proprietary connectivity, integrating the Beolab 600 with modern non-B&O equipment requires an adapter or custom interface. Some audiophiles have retrofitted the speakers with standard RCA or XLR inputs and external active crossovers to preserve functionality while enabling broader compatibility.

Sound Characteristics

The Beolab 600 delivers a balanced, detailed, and dynamic sound signature. The coaxial mid-tweeter unit provides exceptional clarity and precise imaging, making the speakers ideal for critical listening. Vocals and acoustic instruments are rendered with lifelike presence, while the active bass section ensures deep, articulate low-end response without bloat.

The soundstage is wide and three-dimensional, with instruments placed accurately in space. The active design minimizes phase errors and driver interaction, resulting in a transparent and natural tonal balance. While not as bass-heavy as some modern subwoofer-augmented systems, the Beolab 600’s integrated woofer provides more than adequate low-frequency output for most listening environments.

Legacy and Collectibility

The Beolab 600 is now considered a classic of 1980s high-end audio. Its combination of advanced engineering, premium materials, and timeless design has made it a sought-after item among vintage audio collectors and Bang & Olufsen enthusiasts. Units in good condition, especially those with original finishes and grilles, command high prices on the secondhand market.

While later models like the Beolab 8000 and Beolab 5 introduced digital signal processing and further refinements, the Beolab 600 remains a milestone as one of B&O’s first fully active floor-standing systems with integrated tri-amplification.

Maintenance and Considerations

Owning a pair of Beolab 600 speakers today requires some technical awareness. The internal amplifiers and power supplies may need servicing after decades of use, particularly capacitors that can degrade over time. Finding qualified technicians familiar with vintage B&O electronics is recommended for restoration.

Additionally, due to their weight and size, the speakers require sturdy flooring and careful placement to avoid tipping. Their high sensitivity to placement means room acoustics play a significant role in achieving optimal sound.

Conclusion

The Bang & Olufsen Beolab 600 is more than just a speaker—it is a statement of design and engineering philosophy. From its sleek aluminum enclosure to its sophisticated active electronics, every aspect reflects B&O’s pursuit of perfection. While no longer in production, the Beolab 600 continues to impress audiophiles and design lovers alike, standing as a testament to the golden era of high-end audio. For those who appreciate the fusion of form and function, the Beolab 600 remains a pinnacle of 1980s audio innovation.