HiFlight has got the description off the difference between the two headphone sockets very accurately described. I agree with his comments almost exactly. I would just like to add that in my JH16pro IEM, I hear some slight hiss from the edge socket which disappears once you start listening to music. But I find it the most accurate presentation from the Tera Player. Listening to the center socket sounds very slightly duller and a touch recessed after the side socket.
I've also been using the Tera Player with the Yuin PK1 and the match is pretty tremendous. Easy-to-use, portable and you can listen for an entire day without the slightest bit of discomfort. Some of the 2 microphone Clarity Recordings played through this combo are to die for.
With 200 hours burn in on the Tera and 300 hours on the PK1 (thanks HiFlght for the suggestion), I am currently in audio heaven!
Edited by flkin - 10/5/12 at 11:56pm
Originally Posted by HiFlight
I can't say that I have really noticed a difference in sound between when my Tera-Player was new and now that I have several hundred hours on it. Yes, there is a clear difference between the 2 sockets...the center socket is a bit more laid back and sounds like a bit of crossfeed was built in. The other socket retrieves some additional detail from the music in the higher frequencies and has a higher output.
I find that I go back and forth between the 2 outputs depending on which phones or IEM's that I am using. When I first received my Tera, I couldn't really hear much difference between the two, but as I got more familiar with the sound of the player, it became progressively easier to hear the differences.