【Trade-In Under-Seat Woofer Set for BMW UG-BMW 20SUB U】

This is a 20cm trade-in type under-seat woofer for those who want a bit more low-bass thickness and spread from the BMW factory audio.

Designed to replace the woofers under the factory seats, it strengthens the low end without significantly changing the look inside the cabin. Since the wiring uses a connection type that plugs into the factory connectors, it’s also easier to achieve a natural, non-retrofit-style finish.

The unit uses a 20cm carbon-fleece sandwich cone diaphragm, a powerful neodymium magnet, and a high-rigidity aluminum die-cast frame. It’s not just about increasing bass quantity—by adding thickness to the low frequencies that support vocals and instruments, it’s well suited for anyone who wants to enjoy everyday music in a more three-dimensional way.

For BMW, compatibility may vary depending on the model, year, and the specifications of the factory audio. The design is intended to fit most BMW vehicles, but you will need to confirm whether it can be installed on your specific vehicle.

Even with the same woofer, how tightly the sound comes together can differ depending on the match with the factory system and the installation condition. If it were me, I would first listen to what you feel is missing or unsatisfactory in your current sound, and then determine whether a woofer swap alone is enough—or whether other parts should be reviewed as well—based on your vehicle.

If you’d like to naturally make up for the lack of low bass while keeping the BMW factory audio, please feel free to consult us. We’ll check your vehicle model, year, and factory audio specifications, and decide on the direction together with an achievable, well-balanced setup.

Main Specifications / Specs

【Basic Information】

• Product name: Trade-In Under-Seat Woofer Set for BMW UG-BMW 20SUB U
• Type: Under-seat woofer
• Configuration: 2 x 20cm woofers set

【Unit】

• Diaphragm: 20cm carbon-fleece sandwich cone
• Magnet: Neodymium magnet
• Frame: Aluminum die-cast frame

【Connection】

• Factory connector connection type

【Fitment】

• For BMW vehicles
• Compatibility needs to be confirmed depending on vehicle model, year, and factory audio specifications