“Impedance I see the impedance is 64 ohms can these headphones be powered well by standard equipment say 3.5mm jacks on laptops, mp3 players etc. or would a headphone amp be recommend?”

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• I use mine with my iPod, laptop, and many products within a sound system. They work fine.

  Answered by Kittens123 14 years ago

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• The impedance is indeed 64 ohms, however, the HD 280 is very sensitive and works great with low output devices.

  Answered by TheSennheiserSoundGuy 16 years ago

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