This is a classic 17cm cone woofer by DynAudio. It goes well with the company's tweeter D-28/2 etc.
Perfect for bookshelf use It is characterized by a high resolution as well. Urethane on the magnet side has deteriorated, but the sound quality is not affected. There is a solder trace (Shota Sasaki)
Maintenance Information: 2021.7.2 Good Sweep Test
Main specifications: 17cm cone impedance 4Ω diameter 176mm depth 66.5 mm