Review on Sennheiser HD 660 S: Ultimate Hi-Res Open Back Headphone for Audiophiles by Adam Nowak ᠌

This is a purely personal opinion, not claiming to be the ultimate truth! Excellent product quality, sit comfortably on the head and sound good: expressive, slender and powerful! I listen mainly to heavy metal and this is the perfect model for extreme music styles - smelted from the furnaces of hell 666 all the cleanliness is in its place, nothing "runs" it is neither wide nor narrow, but it feels like you are listening to music in a small club, b drums on high-speed metal are much better, you will feel them with your whole body, clear, how to describe it, soft and natural, no falsity or extra accents are heard in the voices, the mids sound pleasant, characteristic of all Sennheiser headphones, remains, the sound does not cut the ear, Personally, I liked this character, the overall sound has become more detailed, all the nuances of the phonogram are heard in it, but at the same time, the sound of the HD660S is softened, less detailed, but more comfortable.