HD 660S2 Open-Back Audiophile Headphones
Last verified by the Lifetime Picks Editorial Team
Why we picked it
Reference-class neutral sound
Sennheiser HD 660S2 is the modern HD 600 line headphone, open back, transducer reworked for deeper bass extension. The reference audiophile headphone you can drive from a phone amp.
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Community & Review Summary
4,200 Amazon reviews
r/BuyItForLife satisfaction
Total mentions (508 positive)
Amazon category rank
Price History
Best Price!Tracking since May 24, 2026.
Lowest
$395.00
May 26
Average
$397.48
Highest
$399.95
May 24
Pros & Cons from Reviews
Pros
- +Reference-class neutral sound
- +Drivable from a phone amp
- +Replaceable cable + earpads
- +Made in Ireland
Cons
- -Open-back leaks sound
- -Premium price
Independent Video Reviews
Hands-on reviews from independent channels (not the manufacturer), covering what they like and what they do not.
Warranty & Returns
Warranty
2 years
Return Policy
Most items are returnable within 30 days of receipt for a full refund. Some categories have shorter return windows.
Read full return policy