HD25 Amping Question

Can the HD25’s (70 ohms) be driven by the Dragonfly Black or do I need more?

Those headphones are super efficient. Have you tried them just straight out of your phone?

I’ve tried them straight out of the iPhone and with the DFB. These Sennheisers are the latest in my collection, joining my PX200’s and my PX100’s. But the HD25’s sound a little muddy. I’m wondering if they need some break in time.