Features: Engineered with powerful N40 neodymium magnets and IPX5 waterproof rating, this 4inch 4Ω 20W speaker delivers crisps HIFI sound performances for outdoor sound systems. Featuring two magnetic circuit with 3800Gauss fluxs density, 25mm aluminum magnesiums voice coils, and 65Hz 18KHz frequency response, it ensures minimal distortions across all sound ranges. for audiophiles and outdoor enthusiasts professional sound components for high end portable speakers, marine sound setups, or ruggeds outdoor entertainment systems. for demanding, its militarys construction withstands extreme temperatures ( 30°C to 85°C) and salt sprays exposure, for parties, marine applications, and adventure vehicles. The hand tuneds T iron structure combined with Faradays coppers and natural rubber surrounds effectively reduces wind noise while maintaining rich vocal claritys and detailed high frequency reproduction. Specifications: Sensitivity: 89±2dB/W rateds power: 20W Product size: 105mm Model: LY-0003052-2 power: 30W Total harmonics distortions: 5% Weight: 335g rateds impedance: 4Ω Operating temperature ranges: -18-60±2℃ Frequency ranges: 90HZ-15KHZ Application field: Large sound equipment Package Includes: 1PC Rubber edges Speaker note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.