Sennheiser hd 660s vs drop hd 6xx

[WaveTheory]

I speak to that in here:

Sennheiser HD660s

INTRODUCTION It’s time to come back down to reality after a brief (but fun!) foray into high-end headphone systems. The Sennheiser HD660S headphone crossed my desk recently and I had a good listen. Let’s see what I found… TL;DR The Senn HD660S is a very good ~$200-250 headphone that unfortunately sells for $500 from most retailers. It has its strengths and offers a slightly different signature than its popular sibling model the HD6XX from Massdrop. It’s more forgiving than its 6XX sibling of …

Hope it helps.