Yamaha 20cm full range unit with unknown details. Uses fixed edges and Alnico magnets. How about using it as an introduction to DIY audio? There are stains on corn paper and white stains like paint (Murakoshi Yoichi)
Maintenance information: 2022.11.29 sound output confirmed
Accessories: none
Main specifications: 8Ω 15W screw pitch (diagonal) 195mm external shape 201mm depth 181mm