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Compare Sennheiser HD 650 vs. Sennheiser PXC 550-II Wireless

This is a side-by-side comparison of the specs of the HD 650 vs. the PXC 550-II Wireless. Differences are highlighted in yellow.
Item HD 650 PXC 550-II Wireless
Item image Item image
Active noise cancellation? Yes [x]
Impedence 300Ω [x] 490Ω [x]
Wireless? Yes [x]
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