Altec Lansing 604E (1967)
A 2-way 38 cm coaxial speaker unit released in 1967, used in professional recording studios worldwide.
Overview
The Altec Lansing 604E is a 2-way coaxial speaker unit introduced in 1967, designed for professional audio monitoring. It features a 38 cm cone-type low band driver and a horn-type high frequency driver, arranged in a coaxial configuration for coherent sound reproduction. This unit was widely adopted in recording studios around the world, serving as a trusted reference speaker during the analog era. Two impedance variants were produced: 8 Ω and 16 Ω.
Specifications
| Frequency characteristic | 20 Hz to 20 kHz |
| Lowest resonance frequency | 25Hz |
| Impedance | 8 Ω, 16 Ω |
| Rated input | 35W |
| Allowable input | 50W |
| Crossover frequency | 1.5kHz |
| External dimensions | Diameter 389x Depth 283 mm |
| Weight | 15.4kg |
| Low band driver | 38 cm cone type |
| High frequency driver | Horn Type |
| Magnetic flux density (Low band) | 13,000 gauss |
| Magnetic flux density (High pass) | 15,500 gauss |
Context
The 604E was a hybrid speaker unit used in recording studios around the world, valued for its accurate sound reproduction in critical listening environments.
Market
The original price was ¥139,300 per unit around 1970, later revised to ¥148,300 after 1970.
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