Plug & play under-seat subwoofer for select BMW vehicles. The Harman/Kardon Flow 80 subwoofer delivers true, accurate and. Powerful bass performance thanks to its space saving inverted. Acoustic structure and powerful neodymium magnet motor with. A large 2-inch voice coil. Designed to integrate flawlessly and. Equipped with a BMW-Specific mounting chassis and plug-and-play. Connector for a direct fit into select BMW models underneath the. Plus, it also can be used to enhance bass performance in. Luxury Audi, Porsche vehicles. Keeping with Harman/Kardon’s clean. Design language, the silhouette of the speaker is a simple circle. Fabric-wrapped grill is reminiscent of other Harman/Kardon speakers. And protects the cone from falling debris. The front magnet creates. The illusion of pushing the cloth grill into the speaker. Metal grill uses the iconic Harman/Kardon 60-degree slash pattern. Based on the “/” in Harman/Kardon, which provides venting for peak. 2 (50mm) Voice Coil Wound on TIL (Glass Fiber) Former. BMW-specific Chassis with Plug-and-play Connector is Included. Harman/Kardon’s Clean Aesthetic Design. 1 Car Audio Security Ltd is a UK based company.