Altec Lansing Voice of the Theatre A9
Huge but remarkably efficient — the big speaker they used to place behind movie screens.
Overview
The Altec Lansing Voice of the Theatre A9 is a cinema loudspeaker system from the iconic Voice of the Theatre (VOTT) series, designed for high-output sound reinforcement in large theatrical environments. Described as "huge but remarkably efficient," the A9 was the workhorse placed directly behind movie screens, delivering the kind of dynamic, uncompressed audio that defined the cinematic experience from the 1950s through the 1970s. While specific technical documentation for the A9 remains scarce, its identity as a full-range VOTT configuration is confirmed by field reports and technical recollections. It carried forward the engineering philosophy of the line: robust construction, high sensitivity, and the ability to handle the punishing volume demands of optical soundtracks and early magnetic surround formats without distortion.
The system was built around the 802D compression driver coupled to an 811B multicell or sectoral high-frequency horn — a pairing known for its clarity, dispersion control, and extreme output capability. Power handling is reportedly in the 50–100W range, which, combined with high efficiency, allowed the A9 to achieve extraordinary sound pressure levels with the tube amplifiers of the era. Collectors note that original 802D drivers are now high-value components, and substitutions with modern equivalents can alter the speaker’s character significantly.
Specifications
| Manufacturer | Altec Lansing |
| Model | Voice of the Theatre A9 |
| Type | Cinema speaker |
| High-Frequency Driver | 802D compression driver |
| Horn | 811B multicell or sectoral high-frequency horn |
| Power Handling | 50–100W |
Historical Context
The Voice of the Theatre (VOTT) series was introduced in the late 1930s and refined through the 1940s, becoming the industry standard for cinema sound. The Altec Voice of the Theatre A9 is part of this lineage, representing a full-scale configuration intended for large venues. The VOTT line gained practical ubiquity in the United States from the 1950s to the 1970s, serving as the primary sound-reinforcement solution in theatres and auditoriums. While models like the A5 and A7 became audiophile favorites in later decades, the A9 remained a professional tool — the big speaker engineered for maximum projection and reliability in commercial cinema applications.
Collectibility & Value
Current market value for a pair of Altec Voice of the Theatre A9 speakers ranges from $1,500 to $4,000+, depending on condition, originality, and configuration. Units retaining original 802D drivers command the highest prices, as these components are critical to the system’s authentic performance. Restoration and repair should be guided by original Altec schematics and service manuals; using modern driver substitutes may compromise the speaker’s tonal balance and efficiency. Despite growing collector interest, comprehensive service data for the A9 remains limited, and full specifications — including low-frequency driver details, sensitivity, impedance, and crossover design — are not documented in available sources.
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