Just asking, because my rMBP sounds so "different" (IMO, "better", but I'll just put "different" as a subjective assessment) compared to all of my other Macs, and compared to my iPhone/iPod Touch/iPad. Under Bootcamp, I see the chip used is still the infamous Cirrus Logic CS4602A. So what am I missing? By the way, it's not placebo. It's "different" under both OS X and Bootcamp. I have tried this with many headphones... my DT880 600 Ohm, Audio Technica ES10, and even the new EarPods show this drastic "difference".