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Compare Sony MDR-ED21LP vs. Sony MDR-RF840RK

This is a side-by-side comparison of the specs of the MDR-ED21LP vs. the MDR-RF840RK. Differences are highlighted in yellow.
Item MDR-ED21LP MDR-RF840RK
Item image Item image
Magnet 300 [x] Ferrite [x]
Impedence 16Ω [x] 28Ω [x]
Cord length 1m [x]
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