M-SERIES 250mm HIGH EFFICIENCY Subwoofer impedance: 2×2 Ohm RMS POWER 2x 200/150 Watt 2″ voice coil gold plated terminals multiple ventilation system improved T-Joke construction HPP cone (high pressed paper cone) PPTA connex spider pole piece hole very stable steelbasket in varnish finish reinforced dustcap LLE (Long Life Edge) https://en.audio-system.de/wp-content/uploads/2023/09/Manual-M10-EVO2.pdf