A revised version of of the [Merlin Mann][merlin] / [Mac OS X Hints][hint] classic:
I’ve changed the layout so that the highest setting sits on 0, instead of boosting frequencies. This leads to a more even sound and less distortion of the high end. Everyone’s ears a little different, so your mileage may vary. Experimentation is encouraged.
Of course, what you’re listening through will make a difference. I heartily recommend [these over-the-ear cans from Audio-Technica][link], or if you’re looking to spend under $50, I don’t think you can do better than [the Sennheiser HD-202s][senn]. If you buy either of them from that link, I get a small kickback.
[hint]: http://hints.macworld.com/article.php?story=20040902070807431 “Original Mac OS X Hints Article”
[merlin]: http://www.43folders.com/2007/08/27/perfect-itunes “Merlin’s post on 43 folders”
[link]: http://www.amazon.com/gp/product/B00007E7C8/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00007E7C8&linkCode=as2&tag=extrafuture-20 “Audio-Technica ATH-M30 Professional Studio Monitor Closed-back Dynamic Stereo Headphone”
[senn]: http://www.amazon.com/gp/product/B003LPTAYI/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B003LPTAYI&linkCode=as2&tag=extrafuture-20 “Sennheiser HD 202 II Professional Headphones (Black)”