FiiO E5 amp with Sennheiser HD25's
Jul 5, 2009 at 2:42 AM Post #4 of 4
an iPod Touch 2nd generation drives the HD25 very nicely, so I suspect your iPhone will too. The HD25 sounds quite good unamped (and I say that about very very few headphones), so IMO you don't need the E5 to get very good-quality sound from it. Plenty of volume too, unless you like your music much louder than I find comfortable, or have unusually quiet source material.

But in general I think having an amp is always a good thing, so I wouldn't discourage the E5 either.

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