Black granite audio board, 30 mm thick base [medium size] manufactured in millimeter units of less than 400 to 2000 square centimeters per sheet, 100 square cm @1500 yen, Yamanishi black speaker, suppresses amplifier vibrations, improves treble and bass, sound quality improvement effects, marble custom stone specialty store.com
![Black granite audio board, 30 mm thick base [medium size] manufactured in millimeter units of less than 400 to 2000 square centimeters per sheet, 100 square cm @1500 yen, Yamanishi black speaker, suppresses amplifier vibrations, improves treble and bass, sound quality improvement effects, marble custom stone specialty store.com](https://shop.r10s.jp/mgs/cabinet/audio/sansei/santyu-30-02.jpg)
Price: 14,525원
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