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How sensitivity are the Ultrasone hfi 550 and 650?

post #1 of 2
12/9/04 at 1:05pm
Thread Starter 
Are the Hfi-550 and hfi-650 equally hard to drive from a portable? i mean will they sound eqally loud at the same volume from my portable?
Tanku..
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post #2 of 2
12/9/04 at 1:45pm
The HFI700's are very easy to drive. I use them on the absolutely lowest volume possible out of my audigy2 and also on the lowest out of my portable, which can be a little too loud, depending on the mp3s volume.
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