The bass and the highs are nicely balanced and Languages act not muffled or tinny as I had been in some headphones. What was very important to me personally because I hear a lot of audio books I want a natural language and no buzzing or a tinny sound. This gets the headphones out well. Overall, the tone for this price looks super tuned, I personally would not expect. For comparison, I was In-Ears by House of Marley, Sony and Panasonic take which were in the price range between 15- 25 euros. From the processing of the FSL headphones act in addition to the House of Marley with the best, very nice just to look through the wood look. The bag which there is to be also practical, by squeezing the sides makes this open and close automatically when you let go.
This product was me provided free by the manufacturer, but this does not affect my review. I test and review the product always objective and according to my feelings.