SKN: 8001 0210 ...  Tannoy System 800, i8AW, i8MP, D50 and CMS8 TDC  dual concentric driver. 4 ohm.

This driver also replaces the NFM 8 Series I and Series II dual concentric speaker (because there are no recone kits for that model).  If you use this, you must also replace crossover with System 800 crossover 9700 0022.