Sennheiser HD 660S2: Emotive Bass and Powerful Range –

Sennheiser’s new HD 660S2 is an upgrade for audiophiles seeking exceptional detail with engaging low-frequency performance Sennheiser's updated HD 660S2 expands the capabilities of the 600-series family, the longstanding benchmark for high-performance audiophile headphones. Sennheiser responded to the hi-fi community's

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Sennheiser HD 660S2 - Reviews Headphone Reviews and Discussion

Sennheiser Consumer Audio HD 660 S - HiRes Audiophile Open Back Headphone

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Sennheiser Consumer Audio HD 660S2 - Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil – Black : Electronics

I don't mean to break up the anti-660s2 circle jerk, but I just got mine and they sound amazing out of the box. They have more bass than I was expecting and

Emotive Bass and Powerful Range— The HD 660S2's from Sennheiser

Sennheiser HD 660S2 - Reviews Headphone Reviews and Discussion

Sennheiser HD 660S2 Review Reference Sound Evolved

Emotive bass and powerful range

Sennheiser HD 660S2: The Next Generation Audiophile Sound

World Premiere Sennheiser HD 660S2 Review - The Saga Continues - Soundnews