Bang & Olufsen Beolab 1600M (1986)
The Bang & Olufsen Beolab 1600M came out in 1986. It was part of the early Beolab series, which was B&O's move toward active loudspeakers - each speaker carries its own internal amplification. That let the company tune the drivers and amplifiers as one system, and the result was clear sound, wide dynamic range and good accuracy.
Design Philosophy and Aesthetic
True to Bang & Olufsen’s design heritage, the Beolab 1600M features a sleek, minimalist silhouette that emphasizes form and function in equal measure. The speaker’s tall, slender cabinet is constructed from high-density fiberboard (HDF) and finished in a smooth, matte surface, typically in dark gray or black, contributing to a refined and modern aesthetic. The front baffle is slightly angled, designed to optimize time alignment between the drivers and ensure a coherent soundstage when positioned correctly in a listening environment.
The most distinctive visual feature of the 1600M is its vertically aligned driver array. The midrange and tweeter are housed in a central column, flanked by two bass drivers on either side. This symmetrical layout not only enhances visual balance but also contributes to the speaker’s acoustic performance by minimizing diffraction and ensuring even dispersion.
The grille is optional and fabric-covered. With it off, the whole driver array is exposed. The rear panel has input terminals for line-level signals (typically XLR or B&O's proprietary connectors), a power input, and controls for room compensation and bass level. Those controls were advanced for the time.
Active Speaker Technology
The Beolab 1600M is an active (powered) speaker with built-in amplifiers tailored to each driver. Traditional passive speakers rely on external amplifiers and passive crossovers. In the 1600M, each driver - bass, midrange and tweeter - gets its own dedicated amplifier module. That allows precise control over frequency response, phase alignment and driver protection.
Total output is rated at 160 watts per speaker, spread across the three drivers. The dual bass drivers each receive approximately 60 watts, and the midrange and tweeter run on 20-watt amplifiers. This is bi-amped, or more accurately tri-amped, so each frequency band is amplified on its own, which reduces intermodulation distortion and improves transient response.
The internal crossover is active and electronic, and it works at line level before amplification. That allows steeper filter slopes and tighter driver integration than a passive crossover, which works after amplification and can introduce power loss and phase anomalies. The crossover points are set at approximately 300 Hz between bass and midrange, and 3 kHz between midrange and tweeter.
Driver Configuration and Acoustic Performance
The Beolab 1600M uses a three-way, four-driver configuration:
- Bass: Two 16 cm (6.3 inch) long-throw woofers made from aluminum-coated paper cones, designed for high excursion and low distortion. These drivers operate in a bass-reflex enclosure with a rear-firing port, enhancing low-frequency extension and efficiency.
- Midrange: A single 7.5 cm (3 inch) aluminum cone driver, optimized for clarity and speed in the critical vocal and instrumental range.
- Tweeter: A 2.5 cm (1 inch) soft-dome tweeter with a neodymium magnet, providing smooth and detailed high-frequency reproduction up to 22 kHz.
The aluminum midrange and tweeter cones are rigid and light, which gives fast transient response and less coloration. The bass drivers are more conventional in material. They still benefit from the active design and dedicated amplification, and they deliver tight, controlled bass from a relatively compact cabinet.
Frequency response is quoted as 45 Hz to 22 kHz (+/- 3 dB), with a wide dynamic range and low distortion. Sensitivity is not typically specified for active speakers, since the amplification is internal. The 1600M can reach high sound pressure levels, enough for medium to large listening rooms.
Room Integration and Setup
The 1600M adapts well to different rooms. The rear panel has adjustable filters for bass level and room gain compensation. These let the owner tailor the low-frequency output to room size, placement (e.g., near walls or in corners), and personal preference. That level of control was rare in consumer speakers of the 1980s.
The speakers were designed to be used in pairs, connected to a preamplifier or source component through balanced XLR or B&O's proprietary connector system. They need AC power, so they must sit within reach of power outlets. Because they are active, bi-wiring or bi-amping from an external amplifier is neither necessary nor possible.
Legacy and Collectibility
The Beolab 1600M was one of the first high-end active speakers offered to the consumer market. It paved the way for later models like the Beolab 5, 8000, and 9000, which refined the integrated active design. Production ceased in the early 1990s, and the 1600M remains sought after by audiophiles and design enthusiasts.
Working pairs of Beolab 1600Ms are rare but can be found through vintage audio dealers and online marketplaces. Restoration is possible, though sourcing original parts, especially amplifier modules and drivers, can be challenging.
Conclusion
The Bang & Olufsen Beolab 1600M is more than just a speaker—it is a statement of design philosophy and engineering excellence. Combining active amplification, precise driver integration, and timeless aesthetics, it represents a bold step forward in the pursuit of high-fidelity sound. For collectors and audiophiles, the 1600M is a testament to a period when Bang & Olufsen redefined what a loudspeaker could be, blending art, technology, and acoustic science into a single, elegant form.
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