19904 📃
Six-page brochure for the SONY ES cassette line - ES-I (Normal Position, Type I) and ES-II (High Position, Type II). The central theme is vibration control: Sony explains how cassette deck transport and external sources generate two types of vibration that degrade sound quality, and how the ES mechanism (Establiss Mechanism) counters both. Interior spreads detail the engineering - vibration absorption and vibration minimization through the ES chassis construction. The back page has the full price list for both ES-I and ES-II from 46 to 100 minutes, plus complete specifications including frequency response and noise figures.
- ESメカ振動機能 - Establiss Mechanism - Sony's proprietary mechanism for absorbing and minimizing cassette body vibrations
- スーパーオービットクリスタル - Super Orbit Crystal - magnetic tape material used in ES-I (Normal Position)
- スーパーファインユニアクシャル - Super Fine Uniaxial - magnetic tape material used in ES-II (High Position)
| Model | Type | Price |
|---|---|---|
| SONY ES-I | Normal Position cassette (Type I) | ¥410-710 |
| SONY ES-II | High Position cassette (Type II) | ¥430-780 |
昭和65年10月（1990 October）ESMRK 901
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