Bose's first attempt in the open-ear segment is a success. The Ultra Open Earbuds have a warm and balanced sound. However, they do not reproduce mids flawlessly and voices sometimes sound nasal. Furthermore, the bass lacks a bit of power. Nevertheless, they deliver a quite good sound overall. Drawback: The controls are a bit overwhelming at first.

The Ultra Open earbuds have a warm and balanced sound. However, the mids are not flawless and voices are sometimes nasal. The bass lacks a little power, which is somewhat due to the model type. They cling comfortably to the ears and offer a very long battery life.