In Phase Car Audio XTB 828R 8" 400W Active Subwoofer with Passive Radiator and Class D Amplifer , Black

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PASSIVE RADIATOR: a speaker with no voice coil or magnet, basically a speaker cone. This is not connected to the amp at all COMPACT DESIGN: This sub is only the size of a small desktop computer case. This small footprint allows the user to add thumping bass without compromising space in the boot SUPERIOR SUBWOOFER CONE: The glass fibre subwoofer cone is purpose built for this package, it is lightweight, durable and rigid without compromising sound quality Power Source Type: Corded Electric

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- Crank up the volume in your car with these In Phase subwoofer - it has 400 W of peak power - With its passive radiator, you'll get the right amount of oomph for your favourite track - Its made from woven glass fibre composite, so you don't have to worry about unwanted vibrations