Hifi 3 inch subwoofer bass speaker glass fiber woven basin low frequency powerful woofer speaker . Classification : 3 inch subwoofer . Impedance : 4 ohm . Rated power : 25W . Resonant frequency : 80Hz . Frequency Range : 80Hz- 5000Hz . Sensitivity : 86+ 3dB . Voice coil : 20mm . Net weight : 418g . This woofer is very suitable for subwoofer or three-way woofer. The low frequency is explosive, the contraction is free, and it is integrated, integrating sound quality and face value. Woofer speaker material: 1.The design of the large R-side folding ring is made of raw rubber, which is very elastic, has good compliance, and has a low-frequency response speed. It is suitable for long-stroke working environments. It is matched with a glass fiber cone. 2.The sound cone and the dustproof cap are made of fiberglass material, and all are made of heavy gold. The production cost is not comparable to that of ordinary speakers. The back side is coated with damping glue, and the process is complicated. It can be said that the main cost and core component of the entire speaker is the sound cone. And the results are also gratifying, the bass is very explosive, strong and not boring . 3. The magnet is like a human heart, and there is not enough magnetic field to provide power, and the life-fighting fight will also become a fist embroidering legs. We have no miserly choose 65 magnetic magnets to ensure the heavy output of the horn and the bursting effect. Ventilation holes are added to the basin shelf for better exhaust heat dissipation. Package : 2pcs .