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Compare Sennheiser HD 660 S Apogee vs. Sennheiser RS 120 II

This is a side-by-side comparison of the specs of the HD 660 S Apogee vs. the RS 120 II. Differences are highlighted in yellow.
Item HD 660 S Apogee RS 120 II
Item image Item image
Impedence 150Ω [x] 24Ω [x]
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