Diaphragm for the company's M-100/104, 8 ohm specification. The measured impedance was 5.9 ohms. There is a small wound on the diaphragm (Oikawa Tetsuji)
Maintenance information: 2025.12.22 Conductivity confirmed (measured impedance is 5.9 ohms)
Accessories: case
Main specifications: measured impedance 5.9 ohms