The new 660s2 a worthy upgrade to the 660s and, quite possibly, the 650 replacement so many have been waiting for.
Quick impressions-more in-depth and tech in video below vs 660s
660s2
*better detail retrieval
*better sub bass extension
*tighter bass signature
*better separation of instruments on the sound stage
*better separation of the bass regions to the midrange
*more natural timbre
*less peaky treble execution
*660 still a great sounding headphone just a step behind technically now
*660s will still be a go to for easier to drive and used market should present some good buying opportunities.
*300 ohm headphones preferred by many tube amp lovers.
*more comfortable than 660s both in clamp and headband.
It’s a definite upgrade for my preferences over my owned pair of 660s and I will be selling my 660S in order to purchase a pair of the 660S2
Sennheiser HD660S2 300hm new updated headphones compared to the original 660s headphones!
