Altec Lansing 605B (1967)
A 2-way 38 cm coaxial speaker unit released in 1967, used in professional recording studios worldwide.
Overview
The Altec Lansing 605B is a 2-way 38 cm coaxial speaker unit introduced in 1967. Designed for professional audio applications, it was adopted in recording studios around the world. The unit combines a 38 cm cone-type woofer with a coaxial high-frequency horn and driver, offering a wide frequency response from 20 Hz to 20 kHz. It was offered with 8 Ω and 16 Ω impedance options and rated for 35W input, with a peak handling of 50W.
Specifications
| Type | 2-way 38 cm coaxial speaker unit |
| Units used | For low band: 38 cm cone type; For High Frequency: Horn Type |
| Frequency characteristic | 20 Hz to 20 kHz |
| Lowest resonance frequency | 25Hz |
| Impedance | 8 Ω, 16 Ω |
| Rated input | 35W |
| Allowable input | 50W |
| Magnetic flux density | Low band: 11,000 gauss; High pass: 14,000 gauss |
| Crossover frequency | 1.6kHz |
| External dimensions | Diameter 389x Depth 254 mm |
| Weight | 12.7kg |
Design
The 605B uses a 38 cm cone-type woofer for the low range and a coaxial configuration with a multi-seller horn and driver for the high range. Its magnetic circuit differs from the 604E, resulting in slightly different start-up characteristics, though the overall unit layout is similar.
Context
The Altec Lansing 605B served as a hybrid speaker unit in recording studios globally, reflecting its role in professional audio monitoring during the late 20th century.
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