8" subwoofers in a box are among our most popular subwoofers in a box. They really don't take up much space and can replace classic larger boxes very well if the right model is chosen. 8" subwoofers have a fast and accurate bass, they don't hum and can complement the equipment in the car beautifully about the missing bass component. It's not bad at all in terms of performance either, you just need to choose the appropriate amplifier and set it up correctly.