Altec Lansing 6x9-4a
A coaxial in-vehicle speaker unit with an elliptical woofer and center-mounted cone tweeter, designed for high-fidelity car audio systems.
Overview
The Altec Lansing 6x9-4a is a coaxial type in-vehicle speaker unit manufactured by Altec Lansing. It features an elliptical cone for low-frequency reproduction and a cone-type tweeter positioned at the center of the woofer for high-frequency output. Designed for integration into automotive audio systems, the speaker was built to deliver extended frequency response and high sound pressure levels. Its construction includes an aluminum die-cast frame, contributing to structural rigidity and reduced resonance.
Specifications
| Configuration | For Low Band : Ellipse Cone Type; For High Frequency : Cone Type |
| Frequency characteristic | 80 Hz to 18 kHz |
| Allowable input | 40W (continuous program) |
| Output sound pressure level (new JIS) | 95dB |
| Crossover frequency | 5kHz |
| External dimensions | Width 235x Height 164 mm |
| Original price | ¥ 32,000 (1 unit, around 1982) |
| Sold Separately | Spacer (¥ 4,000) |
Design
A cone-shaped tweeter is combined in the center of an elliptical speaker, allowing for a compact coaxial design with aligned acoustic centers. The unit uses an aluminum die-cast frame, providing durability and improved mechanical stability.
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