Adding bluetooth to a Mini with Harman Kardon audio

My R53 Cooper S has the unexpected bonus of the Harman Kardon premium audio system.  While it has impressive power and sound quality (once

Harman Kardon Automotive Mini

Immerse yourself in the rhythm of life with unrivalled acoustic precision. Elegantly crafted, the Harman Kardon Onyx Studio 7 offers dual tweeters for beautiful stereo performance and a sleek anodized aluminum handle for ease of portability. With 8 hours of battery life, you can move wherever the music takes you. Listen to your favorite playlists or connect two Onyx Studio 7 speakers to create the perfect soundscape for any occasion.

Harman Kardon Onyx Studio 7 Bluetooth Wireless Portable Speaker, Black

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Adding bluetooth to a Mini with Harman Kardon audio

Harman Kardon Automotive Mini

Harman Kardon Neo Portable Wireless Bluetooth Speaker, 10-hours Playtime, IPX7 Waterproof, Palm-size