Quote: I guess that makes sense. The volume was definitely above my listening level, probably more than slightly. 50% output on the Apogee with the pink noise is about the equivalent volume I listen to louder music at - Solid Green LED.   Additionally, I kind of doubt a USB powered...

Ok.   But the volume I have ran it at isn't unreasonable or likely to cause damage? Sorry if I sound paranoid or a rookie novice - I am :)

I have just purchased some AKG Q701 headphones and am using them with my MacBook Pro through an Apogee ONE interface.   Listening to music through iTunes, I have "sound check" enabled, and at full volume (with sound check on) the volume is still listenable and songs tend push the Apogee...