Sennheiser HD 660 S Audiophile Headphones

Model

HD 660 S

Brand

Sennheiser

Selling my pair of Sennheiser HD 660 S open-back audiophile headphones. The HD 660 S's have a reputation for being some of the best for high-res listening, are increasingly hard to find, and have an impressive set of specs (see photos). I've enjoyed uncovering more details in many of my familiar songs and albums, and they are a great investment for someone who also likes diving into their music as a standalone experience beyond casual listening. If I felt I still had the time to do this regularly, I'd be holding onto them, but it's time to let someone else love them. Please note that these are open-back, meaning having access to a relatively quiet space and the right amplification is usually recommended for best results (I use a FiiO DAC/Amp combo unit that runs these well). Basically, just be aware of what you're getting into. I'm happy to answer questions or give suggestions if you're new to this! These have been well cared for and come with their default 6.35mm standard and 4.4mm balanced cables, an additional balanced cable, a 6.35 to 3.5mm adapter, and a handy storage case. The headphones with the default cables alone retail for $680, I'm asking $420 for all.