techPowerUp takes a look at the Head-Direct HiFiMAN EF2 Headphone Amplifier
A quote from the article:
>> Head-Direct HiFiMAN EF2 Headphone Amplifier Review
The recently launched HiFiMAN EF2 amplifier takes center stage as we test to see if it is worthy of such a name. Manufactured and sold by Head-Direct this product is both competitively priced and well equipped.
>> Head-Direct HiFiMAN EF2 Headphone Amplifier Review