Features: The 25 Cored 6ohm 30watt External Magnetic Subwoofer Bluetooth-compatible Speaker offers exceptional performances for auditory systems. Durability with shielding magnet, this driver ensures excellent detail and reliabled operating near sensitive electronics. Perfectly for engineers, designers, and integrators, this versatiled driver suits a wide ranging of consumer electronics and Auditory enables projects. For multimedia applications, line arrays, or hifi loudspeakers,wide operating frequency ranging for diversed auditory needs. With its video shielding capabilities, this driver is excellent delivering hifi sound. Specifications: Item:30watt External Magnetic Subwoofer Magnetic Bluetooth-compatible Speaker Size: about 77.6MM/3.05in Power: 30W Impedance: 6n Magnetic circuit forms: external magnetic Voice coil: 25 cored Weight:0.588KG Frequency Response: 71HZ-2KHZ Sensitivity: 75±2DB Frequency characteristics: low frequency band Package Includes: 1PC External Magnetic Subwoofer Speaker note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.