The Yale Sound driver has arrived for the first time in 10 years! It is 7550DE for medium and high tones. An inscription machine that has both an overwhelming amount of information and a glossy tone. It is still a popular driver for enthusiasts today. The appearance may be dullness, oxidation, etc. Also, there are some cracks in the body. Serial 13275 (Satoshi Yoneshima)
Maintenance info: 2021.11.14 Oscillator test good
Accessories: original box
Main specifications: Impedance 8 Ω Playback frequency band 100 ~ 10,000 Hz Outside diameter 160 × depth 170 mm Weight 23 kg