Richard Allen double cone type 20cm full range unit. It's a deep, narrow range, and it's a sound that sits on your back. They are beautiful individuals compared to their age. (TAMURA Eiji)
Maintenance information: 2025.11.27 sweep check OK
Accessories: original box
Main specifications: 8 ohms playback frequency band 45 to 15,000 Hz output sound pressure level 91 dB baffle aperture diameter 178 mm weight 1.8 kg