8cm cone unit with unknown details. The metal-colored center cap is impressive. The edge is urethane, but it has good elasticity, and it seems that you can still enjoy it (Murakoshi Yoichi)
Maintenance information: 2022.10.22 sound output confirmed
Accessories: none
Main specifications: measured impedance 8/8 Ω screw pitch (diagonal) 108 mm external dimensions φ106 mm depth 44 mm 193 g