CO SERIES 200mm High EFFICIENT Woofer 1.5" voice coil, HEM (High Efficient Magnet) magnet Improved T-Joke construction LLE (Long Life Edge) Reinforced dust cover Stable connection terminals Multiple ventilation system PPC membrane Very stable metal basket and PPTA Connex-Spider Woven strands Installation depth: 92 mm Installation Ø: 177 mm outer Ø: 212 mm Impedance: 4 Ohm 280/180 watt Suitable for: 8 inch