Altec Lansing 409-8D (1977)
A 2-way 20 cm coaxial speaker unit released in 1977 with an 8 Ω impedance and 16W power handling.
Overview
The Altec Lansing 409-8D is a 2-way 20 cm coaxial speaker unit manufactured by Altec Lansing and released in 1977. Designed for full-range audio reproduction, it features a coaxial configuration with a 20 cm cone-type driver for low frequencies and a cone-type high-frequency unit. The speaker has a frequency response from 50 Hz to 14 kHz and produces a sound pressure level of 96 dB (New JIS) at standard input. It was originally priced at ¥12,000 per unit in its domestic market.
Specifications
| Type | 2-way 20 cm coaxial speaker unit |
| Units Used | For low band: 20 cm cone type; For High Frequency: Cone Type |
| Frequency characteristic | 50 Hz to 14 kHz |
| Lowest resonance frequency | 84Hz |
| Impedance | 8 Ω |
| Allowable input | 16W |
| Output sound pressure level | 96 dB (New JIS) |
| Voice Coil Diameter | 25mm |
| Weight | 1.3kg |
Design
The 409-8D uses a 20 cm diameter 2-way coaxial type speaker unit layout, integrating both low and high-frequency drivers in a single axis configuration for coherent sound dispersion.
Market
The Altec Lansing 409-8D was sold at an original price of ¥12,000 per unit, indicating its position as an accessible component speaker in the late 1970s Japanese audio market.
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