[TwitchBladE]

A friend of mine just bought a Hifiman EF2A amp/dac, and when him and I hook it up, no sound goes out to his grado sr125i's. 
 
He's using a laptop with with windows 7 64bit if that's of any use. 
 
Windows seems to identify it, but doesn't output any actual sound.
 
 

 

[Satellite_6]

Uhhhh, plug it back in/try a different USB port. If that doesn't work it's bust. 

 

[TwitchBladE]

woops.
 
Sorry. We made a derpy mistake with the power. Thanks anyway.
 
It works now.