@roger,
My hearing has always been good. I never use more than 5 on a 0 - 10 scale on the audio and around 3 most of the time so I think it will give you enough volume. There is no amp distortion even at full volume. Will have GF try it soon, she has hearing problems.
The LED brightness range is bigger. Cranked up high it induces pseudo hallucinations, mostly geometric patterns but that probably depends on the beholder. Full bright is uncomfortable. And this is with your eyes closed.