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Like the title says, is the Fiio E7 enough to power the DT 990 PRO 250 ohm's? I'm listening to modern music like pop, hip hop, rap, r&b, etc.

 

I looked at Fiio's website and they don't recommend to use the E7 with higher than 150 ohms, but people say it works just fine. I'm really confused. Any advice?