Usage Tips:Description/Features: High-Performance Audio: Experience superior sound with our 3-inch subwoofer speaker, designed for 15W output and 4 ohm impedance, perfect for custom audio projects Construction: Crafted with robust materials, this 78MM speaker ensures and consistent performance, making it a reliable choice for your DIY audio setups Versatile Application: Ideal for building or upgrading bookshelf speakers, this subwoofer enhances any home audio system with rich, deep bass and clear, vibrant sounds Easy Installation: Comes with user-friendly features for a hassle-free setup, allowing audio enthusiasts and DIYers alike to enjoy high-fidelity sound in no time Specifications Due to different batches, there may be differences in product appearance and printed text, which not affect use Color: Black Material: ABS Package Contents: 1 x Audio Speaker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.