Real owners rate these about evenly: 60% of 55 Grado SR80x owners recommend it, vs 61% of 231 for the Sennheiser HD 660S2.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
“SR80x (120€ new) was my first audiophile headphone over two years ago. They were so good that within a week I returned them to upgrade to SR225x”— Hunter-97-G on Reddit
“Grado SR80s were my first decent pair of headphones too, and I still love them - still have them and listen to them something like 15 years later.”— srmd22 on Reddit
“Using chinese components. And a lot of glue... You'd think with all that American Engineering, we could not use Glue, and instead use... maybe screws?”— KaosC57 on Reddit
Real owners rate these about evenly: 60% of 55 Grado SR80x owners recommend it, vs 61% of 231 for the Sennheiser HD 660S2.
Owners point the Grado SR80x at first-time audiophiles wanting an affordable, exciting-sounding upgrade from stock earbuds, and listeners who love an energetic, forward, treble-tilted sound signature.
Owners point the Sennheiser HD 660S2 at hD6x0 owners wanting more bass extension and treble sparkle, and all-day listeners who want a warm, fatigue-free sound.
The most-cited downside of the Grado SR80x is glued-together build (drivers, gimbals, rodblocks, headband) that owners view as flimsy, breaks over time, and often requires DIY hot-glue or aftermarket-part repairs. For the Sennheiser HD 660S2, it's dark, veiled or muffled-sounding presentation.