Features: Engineered with double neodymium magnets and long excursions design, this 57mm bass loudspeaker delivers powerful 15W output with enhanced low frequency response, perfect for subwoofer upgrades in car auditory or home sound equipment. Featuring aluminum voice coil for rapid heat dissipation and durability rubber surround for vibrating absorption, this 4ohm driver maintains clear auditory reproduction while minimizing distortion during high performances operating. Designed for audiophiles, enthusiasts, and car auditory upgraders seeking professional bass performances in compact loudspeaker components for customized sound solution. Optimizes sound environment ranging from home theaters to automotive sound equipment, delivering punchy low end frequencies ideal for hip hop, and action movie soundtracks. The ABS metal hybrided construction ensures lasting durability, while its 2.25inch compact size allows flexible integration into various loudspeaker enclosures without compromising studio quality bass output. Specifications: Component: ABS+Metal Size: about 57x57mm/2.24x2.24in It can be used in various occasion such as auditory equipments, car auditory, professional auditory equipment Quantity： 1/2PCS Package Includes: 1/2PCS 57mm woofers note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.