Altec Lansing 605B (1967)
A 2-way 38 cm coaxial speaker unit released in 1967, used in professional audio environments worldwide.
Overview
The Altec Lansing 605B is a 2-way 38 cm coaxial speaker unit introduced in 1967. Designed for high-fidelity reproduction, it features a coaxial configuration combining a 38 cm cone woofer and a horn-type high-frequency driver. It was used in recording studios around the world, serving as a hybrid monitor speaker in professional audio applications.
Specifications
| 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 |
| Magnetic flux density, High pass | 14,000 gauss |
| Crossover frequency | 1.6kHz |
| External dimensions | Diameter 389x Depth 254 mm |
| Weight | 12.7kg |
| Low band driver | 38 cm cone type |
| High frequency driver | Horn Type |
Design
The 605B uses a 38 cm cone-type woofer for the low range and achieves a coaxial configuration by mounting a multi-seller horn and driver at the center of the woofer. Its unit design is similar to the 604E, though it has different start-up characteristics due to a modified magnetic circuit.
Context
The 605B was a hybrid speaker unit adopted in recording studios globally, reflecting its role in professional audio monitoring during the late 20th century.
Market
Original pricing in Japan ranged from ¥119,700 around 1970 to ¥138,700 by 1976, with a post-1970 revision increasing the price to ¥128,300 per unit.
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