The 7xx is going to be one of my main stays that I keep around in case I need to adjust my ears back to a neutral sound, yes, kings of neutrality these phones hold nothing back about a recording, the detail retrieval is pretty stellar with good sourcing and amplification, slightly forward presentation but neutral and laid-back especially above the upper mids. These don't have a lot of drawbacks aside from some crispness that can show itself on certain tracks but for the most part it is a phone that stays true to the source so it is recording...

This cable improves the extension in both the treble and the bass and gives the whole spectrum a balance reminiscent of Beyerdynamic T1s. The Midrange becomes sweet and tones seem to take on a hue that serves to almost always improve the music. Grain seems to disappear, though transparency is only a little improved. The bass seemed to get deeper and also improved in tone.   Overall a big improvement in audiophile qualities in the music.

For someone who has had around 7 separate headphone systems the Peachtree audio Nova came as a breath of fresh air. It is a solid all in one solution that delivers audiophile quality sound at good price.   The Nova contains 3 different pieces - It is a DAC, Headphone amplifier, and Integrated amp. The DAC is it's greatest asset. It is a sweet chipset that delivers the sound of a DAC almost as expensive as a the total package. The Headphone amp in combination with the HD600s were a great match. I have heard on here the headphone amp is similar...

These are some of my favorite headphones. They have twice come into my life.