Altec Lansing 811B
A die-cast aluminum Celtal horn used in professional and high-fidelity speaker systems
Overview
The Altec Lansing 811B is a Celtal horn manufactured by Altec, designed for use with specific compression drivers in high-performance audio systems. It was commonly paired with drivers like the 802-8D, 806-8A, and 807-8A, and integrated into systems such as the A7-8. The horn provides uniform sound pressure distribution across a 90° horizontal and 40° vertical dispersion pattern, making it suitable for use in theaters and auditoriums where wide, consistent sound coverage is required.
Specifications
| Crossover frequency | 800Hz |
| Directional characteristics (horizontal x vertical) | 90° x 40° |
| External dimensions (1970 catalog) | Width 470 x Height 220 x Depth 340 mm |
| External dimensions (1976 catalog) | Width 476 x Height 219 x Depth 343 mm |
| Weight | 4.1kg |
| Compatible Drivers | 802-8D, 806-8A, 807-8A |
Design
A typical aluminum die-cast Celtal horn, the 811B features wide diffusion characteristics and is engineered for consistent sound reproduction. Its design supports uniform sound pressure distribution, enhancing its effectiveness in large listening environments.
Context
The 811B was used in multiple speaker systems, including the Altec A7-8, indicating its role in both professional and high-fidelity audio applications. Its directional control and compatibility with established drivers suggest it was a standard component in Altec’s modular speaker design approach.
Market
Original pricing for the 811B increased from ¥18,800 around 1970 to ¥21,300 after a price revision, reaching ¥27,900 by 1976, reflecting its value as a precision audio component during that period.
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