Guppy_
100+ Head-Fier
gsmarena... provided a no-reading review for the BnO DAC... sigh.. had high hopes.
http://www.gsmarena.com/lg_g5_and_friends-review-1432p3.php
http://www.gsmarena.com/lg_g5_and_friends-review-1432p3.php
As expected the LG Hi-Fi Plus with B&O Play delivers top marks for audio clarity no matter if you are plugging an active external amp or a pair of headphones. The stereo crosstalk is kept low, while the loudness is above the average.
If we are to compare it with the LG G5 output - the extension delivers louder sound, with deeper bass levels, and quite expectedly - wider dynamic range. It isn't the best DAC you can buy though, and considering the high price, you should opt for this only if you will be using it on the LG G5 and with a proper pair of headphones. For any other case, we suggest you shop around first.
By the way, using it on a PC requires for you to install a special driver (navigate to the fifth tab and scroll down). Then you will get a control panel for the upsampling options.
It does improve the quality over the LG G5 and most of the audiophiles will be able to tell it even with cheaper headphones, but we are not sure if its high price tag serves it right.