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Compare Sennheiser HD 660 S Apogee vs. Sony MDR-RF811RK

This is a side-by-side comparison of the specs of the HD 660 S Apogee vs. the MDR-RF811RK. Differences are highlighted in yellow.
Item HD 660 S Apogee MDR-RF811RK
Item image Item image
Impedence 150Ω [x]
Cord length 16m [x]
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