You'd think the distorted highs/lows of the retail version would be enough to tell the difference. I listened on my (work issued) Jabra "whatever" headphones,

You'd think the distorted highs/lows of the retail version would be enough to tell the difference. I listened on my (work issued) Jabra "whatever" headphones, and i could tell right away (without looking) when it switched from retail to GH, just by the distorted highs/lows. I also get extremely exhausted from listening to music maximized for loudness, while listening to almost anything recorded in the 70's can go on for hours without any sign of exhaustion.