Bang & Olufsen Beolufsen 505 (1970)

Name: Bang & Olufsen 505
Brand: Bang & Olufsen

The Bang & Olufsen Beolufsen 505 is a pair of passive bookshelf or stand-mounted loudspeakers introduced in 1970 as part of B&O’s integrated hi-fi system approach. Designed to complement receivers like the Beomaster 1900, the 505 embodies the Danish brand’s minimalist Scandinavian design language and commitment to aesthetic harmony across components. With a warm, balanced sound and elegant beech wood veneer finish, these speakers were aimed at discerning consumers who valued both form and function.

Though not positioned as a flagship model, the 505 remains a representative example of Bang & Olufsen’s mid-tier offerings during the early 1970s, reflecting the company’s philosophy of creating cohesive audio ecosystems.

Specifications

Feature	Specification
Model	Beolufsen 505
Brand	Bang & Olufsen
Year of Release	1970
Production Period	1970–1974
Type	Passive, 2-way loudspeaker
Enclosure	Bass reflex (ported)
Drivers	1x woofer, 1x tweeter (exact sizes not documented)
Impedance	4–8 ohms (typical for B&O of this era)
Power Handling	Not officially specified (passive design)
Sensitivity	Unknown
Crossover	Internal, 2-way (exact frequency not documented)
Finish	Beech wood veneer with removable fabric grille
Dimensions (approx.)	30 cm H × 18 cm W × 22 cm D
Weight	~5 kg per speaker
Compatibility	Designed for use with B&O amplifiers (e.g., Beomaster 1900)

Historical Context

The Beolufsen 505 emerged during a pivotal era for Bang & Olufsen, when the company was solidifying its reputation for high-fidelity audio systems wrapped in timeless design. Released at the dawn of the 1970s, the 505 was part of a broader ecosystem of components that emphasized visual and technical synergy. This period saw B&O championing modular, matching systems where speakers, amplifiers, and turntables shared materials, proportions, and design cues.

The 505’s beech wood construction and clean lines reflect the minimalist Scandinavian aesthetic that defined B&O’s identity. Unlike many contemporary brands that prioritized raw performance, Bang & Olufsen focused on user experience, integration, and longevity. The 505 was never intended to compete with high-end audiophile speakers but instead offered a refined, balanced sound suitable for everyday listening in stylish home environments.

These speakers were often paired with the Beomaster 1900 receiver and Beogram turntables, forming a complete, visually harmonious setup that appealed to design-conscious consumers across Europe and North America.

Sound Signature

The Beolufsen 505 delivers a warm and balanced sound profile typical of Bang & Olufsen’s consumer-oriented designs of the era. The midrange is clear and present, making vocals and acoustic instruments sound natural and engaging. Bass response is enhanced by the bass reflex enclosure, providing a sense of fullness without excessive boominess.

High frequencies are smooth and non-fatiguing, though not as detailed or extended as those from B&O’s higher-end models like the Beolab series. Overall, the 505 offers a pleasing, musical character well-suited to jazz, classical, and vocal-centric genres, especially when driven by matching B&O electronics.

Maintenance and Restoration Tips

Due to their age, Beolufsen 505 speakers often require some restoration to perform and look their best:

Foam Surround Replacement: The most common issue is deteriorated foam surrounds on the woofers. Replacing them with modern rubber or foam kits restores bass response and prevents further damage.
Grille Fabric: The original fabric on the removable grilles may be faded or torn. Replacement with period-correct or neutral fabric can improve appearance.
Veneer Care: Clean the beech wood veneer with a soft, dry cloth. For deeper restoration, light polishing or professional refinishing may be needed to restore luster and remove scratches.
Terminal Maintenance: Check speaker terminals for corrosion. Clean with contact cleaner and ensure solid connections to prevent signal loss.
Crossover Inspection: While generally reliable, older capacitors in the internal crossover may degrade. An audio technician can assess and replace components if necessary.

Collectibility and Market Value

The Beolufsen 505 holds moderate collectible appeal, rated around 5/10. While not as sought-after as rare Beolab models, they attract collectors of vintage B&O systems and Scandinavian design enthusiasts. Their value lies more in aesthetic and historical significance than sonic performance.

As of recent market trends, a pair of Beolufsen 505 speakers in good working condition typically sells for $100–300, depending on cosmetic state, completeness (including grilles), and whether restoration has been performed. Fully restored pairs with matching B&O electronics may command higher prices in niche markets.

Conclusion

The Bang & Olufsen Beolufsen 505 stands as a testament to the brand’s 1970s vision of integrated, design-forward audio systems. While modest in specifications, its elegant construction, cohesive styling, and warm sound make it a charming addition to any vintage hi-fi setup. For collectors and fans of Scandinavian design, the 505 offers an accessible entry point into the world of classic B&O audio.