Overview
This is an ALTEC A7 H825 professional theater speaker system, released in the 1950s as part of the company’s renowned Voice of the Theatre lineup.
Of the Voice of the Theatre systems first introduced in 1945, the A7 is perhaps the best known. The project’s goal was to create the finest theater speakers possible, and their powerful sound pressure and dynamic sound quality continue to captivate audio enthusiasts today. With the addition of the A7, the Voice of the Theatre line reached more theaters and private collectors, making it a bridge between professional theaters and home audio. Like the A4 and A5, the A7 is now a highly sought-after vintage model.
Originally designed for professional use in movie theaters, the cabinet is rugged and undecorated. Its design reflects a functional beauty focused entirely on sound. This pair features the vertical boards in the bass openings that are characteristic of early models. The substantial appearance is matched by the remarkable ALTEC sound.
This system is designed to bring the atmosphere of a theater into your listening room. The cabinets are thoroughly seasoned and deliver an exceptionally open sound. Given their age, they show signs of use, including chipped paint and scratches, but are in generally good condition. We have included as many photos as possible so you can assess their condition.
The speakers are very clean overall. Please refer to the photos for details of their cosmetic condition.
Specifications
803A, 16Ω
The second model in the 803 series, introduced between 1947 and 1960. It was positioned as the successor to the then-popular 515. Compared with the 515, it has a slightly smaller magnet and lower flux density, placing it in the midrange class of woofers.
Its more compact design made it easier to use while still delivering satisfying bass, and it became a popular woofer. This rare driver is also considered a forerunner of the later 416A woofer.
- Cone diameter: 38 cm (15 in)
- Magnet: Alnico V
- Maximum input: 30 W
- Impedance: 16Ω
- Sensitivity: 103 dB/W/m
- Frequency response: 30 Hz–1,600 Hz
802B, 16Ω
A highly regarded compression driver, also used in systems such as the Capistrano. It is known for its high efficiency and can be used without issue with a low-output amplifier.
- Type: Compression driver
- Voice coil diameter: 4.4 cm (1.75 in)
- Magnet: Alnico V
- Impedance: 16Ω
- Frequency response: 500 Hz–22,000 Hz
- Recommended crossover frequency: 800 Hz
- Maximum input: 30 W
- Sensitivity: 111.7 dB/W/1.2 m
N800D Network
The N800D is a renowned network used in speakers from ALTEC’s heyday. When paired with an H811 or 511B horn, it forms an 800 Hz, two-way system.
- Crossover frequency: 800 Hz
- Impedance: 16Ω
Enclosure Specifications
- Dimensions, each cabinet: 760 mm W × 1,085 mm H × 610 mm D
- Weight, each cabinet: Approximately 40–45 kg
Despite their age, both the exterior and the inside of the enclosures are in very good condition. Please refer to the photos for details of their cosmetic condition.
