【16.5cm Subwoofer for BMW: BMW UPi6-Subwoofer kit】

With the factory audio in a BMW, you may sometimes feel that you want a little more low-end “thickness,” or that the overall sound could use a bit more room and presence.

The BMW UPi6-Subwoofer kit is a 16.5cm BMW subwoofer. It is designed as a set to be used together with the Upi4, and by adding low frequencies that are difficult to cover with the front speakers alone, it helps refine the overall “thickness” and cohesion of your music.

It’s for those who want to add a subwoofer not just to boost bass, but as a foundation that supports vocals and instruments—and for those who want to seriously rethink and improve the sound of their BMW. Even the music you usually listen to may feel easier to enjoy once the low-end support is added, without needing to turn the volume up too much.

Because impressions of this product can vary depending on the finish after installation and the combination with the factory system, it’s important to choose while confirming the vehicle specifications and your current audio configuration. If it were me, I wouldn’t decide on the subwoofer alone first; I would consider the installation details while looking at the combination with the Upi4 and the overall balance inside the car.

Also, after installation, you cannot put the factory speaker covers (plastic speaker grilles) back to their original state. You will use the system with the cover removed, so please confirm this in advance.

Key Specifications

【Basic Information】
・Product name: BMW UPi6-Subwoofer kit
・Type: Subwoofer for BMW
・Size: 16.5cm (6 inches)

【Set/Configuration】
・Set configuration with Upi4

【Notes for Installation】
・Factory speaker covers (plastic speaker grilles) cannot be restored
・Use with the cover removed

Depending on the vehicle model and the specifications of the factory audio, the best combinations and installation methods will differ. If you’d like to further refine your BMW’s sound, let’s decide on a direction together while checking your current system and how you listen.