Sennheiser HD 660 S vs Sennheiser HD 660S2

The Sennheiser HD 660S2 are the next generation of the Sennheiser HD 660 S. While they share the same style, build quality, and comfort, the second generation have a warmer sound that delivers more thump and punch. Their treble range has also been adjusted, so vocals and instruments are a bit more veiled in the sequel, while sibilants become a bit more aggressive due to a dip in the mid-treble region. The 660S2 also come with a dust pouch, so you can store the headphones when not in use.