I duuno about that. Miles was a great artist, but what he would have done is just speculation. It's also speculation about how well his estate is doing. Perhaps they really needed the $$$? Who really knows.

In any case a branded headphone doesn't "tarnish" his reputation in my opinion. As a matter of fact I can see someone wearing these phones and get asked; Who was/is Miles Davis We're nearly 20 years after his death now and a whole generation has not been exposed to his music.