Altec 811B
A cast aluminum sectoral horn component designed for high-frequency drivers in professional and high-fidelity speaker systems.
Overview
The Altec 811B is a horn manufactured by Altec Lansing, designed for use with high-frequency compression drivers such as the Altec 802, 806, 807, 808, and 902 series. It forms part of the Altec A7 speaker system when paired with the 802-8D driver and 416-8 woofer, and was also used in the Altec Lansing Valencia consumer speaker. Known for its controlled dispersion and efficiency, the 811B contributes to the "distinctive 'Altec' sound character" and is praised for clear, detailed, and dynamic audio reproduction. Some users note it can sound "shouty" or "honky" if not properly matched with drivers or equalization.
Specifications
| Dimensions | 22.5" wide x 13.5" high x 12" deep |
| Weight | 23 lbs |
| Material | Cast aluminum |
| Flange | 1/4" thick cast aluminum |
| Mounting | 4 holes for 1/4" bolts |
| Throat | 1" |
| Driver Compatibility | Altec 802, 806, 807, 808, 902 series high frequency compression drivers |
| Crossover Frequency | Typically used with a 500 Hz or 800 Hz crossover |
| Dispersion | 90° horizontal x 40° vertical |
| Frequency Response | 500 Hz to 22,000 Hz |
Design
The 811B is a sectoral horn, also known as a "Mantarraya" or "Sectoral" horn, constructed from cast aluminum. It is designed to provide controlled dispersion and efficient sound projection.
Product Family
The 811B horn is used with 802-8D drivers and is a component of Altec A7 speaker systems alongside the 416-8 woofer. It was also used in the Altec Lansing Valencia consumer speaker.
Market
The 811B horn is highly sought after by vintage audio enthusiasts and collectors. Common issues include seized or stripped mounting bolts, and replacement gaskets for the driver throat are recommended for proper sealing.
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