Altec Lansing 291-16A (1970)
A large-format high-frequency compression driver built for high-power sound reinforcement in theaters and professional venues.
Overview
The Altec Lansing 291-16A is a high-frequency compression driver manufactured in 1970 for use in large sound systems, particularly in theaters and other venues requiring high-output audio. It was designed to deliver extended high-frequency response with high power handling, using advanced materials for its time. The driver was intended to be paired with specific horns and crossover networks, including models like the 311-60, 311-90, 1505B, and the N-500F network.
Specifications
| Frequency characteristic | 500 Hz to 16 kHz |
| Sound pressure level | 131 dB SPL at 40W |
| Impedance | 16 Ω |
| Rated input | 40W |
| Magnetic flux density | 18,500 gauss |
| Recommended crossover frequency | 300 Hz, 500 Hz |
| Voice coil diameter | 7.1 cm |
| External dimensions | Diameter 165 x Depth 124 mm |
| Weight | 9.1 kg |
| Original price | ¥127,000 (1 unit, released in 1970) |
Design
The 291-16A features a Symbitik diaphragm derived from the 288D design, combining a polymid film with an aluminum alloy diaphragm for improved durability and performance. It uses an edge-wise wound flat aluminum ribbon voice coil, contributing to its ability to handle approximately twice the input power of conventional models at the time.
Context
Developed for professional sound reinforcement, the 291-16A was engineered to meet the demands of large venues like theaters, where high sound pressure levels and reliability were critical.
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