The MA-8506 Titanium Series Speaker is a 6รถ waterproof, ultra low magnetic field 200 watt speaker with titanium plated cone. These three way speakers are perfect for replacement or upgrade of existing speakers and the magnets will not interfere with navigation equipment. Peak Power: 200 watts. Continuous Power: 100 W RMS/pair Speaker Impedance: 4 ohm. ASTM UV & Salt Spray Test: Meets or Exeeds 600hrs