Altec Lansing 620J Monitor
A high-end bookshelf monitor speaker system using a coaxial 2-way design, with a premium price point in Japan.
Overview
The Altec Lansing 620J Monitor is a bookshelf-type monitor speaker system built around the 604-8KS coaxial 2-way driver unit. Designed for high-fidelity audio playback, it delivers a wide frequency response from 20 Hz to 20,000 Hz and achieves an output sound pressure level of 103dB.
Specifications
| Method | 2-way / 1-speaker |
| Units used | 604-8KS (Coaxial 2-way) |
| Impedance | 8 Ω |
| Playback frequency band | 20 Hz to 20000 Hz |
| Output sound pressure level | 103dB |
| Maximum input level | 65W (continuous program) |
| Crossover frequency | 1500Hz |
| External dimensions | Width 660x Height 1020x Depth 460 mm |
| Weight | 68kg |
| Original price | ¥ 500,000 (around 1985) |
Design
The 620J uses the coaxial 2-way unit 604-8KS, integrating both high and low-frequency drivers into a single point-source configuration to improve phase coherence and imaging accuracy.
Market
Priced at ¥500,000 around 1985, the 620J Monitor was a premium offering in the Japanese audio market, reflecting its high-performance specifications and substantial build.
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