I've just spent a few hours listening to the BlueJeans IC's. Comparing them to Guerrilla Audio copper IC's, both unbalanced, the most noticeable difference is in the frequency extremes, the Guerrilla Audio offers deeper more articulated bass and more extended highs, I would say the midrange is too close to call it. Soundstage width, depth, focus and resolution are also very close. I've done 5 A/B comparisons and lost interest, I could hear the difference every time. Back to Guerrilla Audio. I've also had some Monster IC's laying around, so I threw them in just for fun, both BlueJeans and GA had a smoother midrange. I've stopped spending serious bucks on expensive IC's and cables a long time ago, (I've had and still have some not very "smart price" IC's laying around, not better than GA IC's by the way!) the diminishing returns from going there are too steep and not always audible, I am happy with my system with Guerrilla Audio IC's.