Question about Bose QuietComfort 25 (Android Remote)

For connection to a stereo system, a transition plug is necessary (not included in the delivery). In my opinion, the Böse quiet-comfort is not suitable for this use. Its great strength lies in shielding against ambient noise when out and about. For use in the home, Böse has better headphones in its range. Noise cancellation always has a negative effect on the sound. Böse has achieved a very good compromise with the quiet comfort.

If your stereo system has a headphone output with a 3.5mm jack plug, you can use this Bose QuietComfort 25 without a transition plug. Unfortunately, most stereo systems only have the 6.3 mm jack plug for headphones, so you would have to use a transition plug.
The sound quality is very good with or without the QuietConfort switched on, but there are even more excellent headphones, which is certainly reflected in the price.