80W speaker pair with magnetic shielding enables mounting closer to sensitive equipmentPowerful speaker magnets really play havoc with compasses unless they re Ultra-Low Magnetic Field speakers. Because their cancelling magnets and shielded enclosures significantly reduce magnetic flux, you don t have to mount them 5 from compasses and autopilots like other systems. 4000 series speakers combine a mid-range polycarbonate cone with a 1 mylar tweeter for full-range frequency response. 80 watts peak power per pair. 4-ohm impedance. Stainless-steel mounting hardware included. Style: Flush mount Watts: 40 per speaker Cone: Polypropylene, mylar tweeter Magnetic Shielding: Yes Waterproof: Waterproof marine Material: Molded plastic Quantity: Pair Color: White Warranty: Two Years