I enjoy listening to music on my phone with wired over the ear headphones. I have an old set of AKG K512 and I wasn't very pleased with the sound quality on my RN8, compared to my previous phones.

To get them to sound very pleasant I did the following:
- Activated Mi Sound Enchancer
- Set headphones type to Mi Headphones
And voila!

I don't use the equaliser and the volume and quality is great for me. Hope this helps someone.