Check out a frequency response graph for the Beats headphones and you'll see that the bass drop + treble boost is exactly what those cans need to sound right. Whatever. It's a stupid problem and I work in tech and I'm not convinced that this is on purpose.
Anyway, the same Beats audio driver works for non-Beats laptops but still has some enhancements (when a non-Beats system is detected) and this problem is likely a universal glitch. I believe if you own any one of these laptops, referred to on the link, that you can install Beats software control panel by extracting the files out of the package from that link and then replacing all the pointers in the STWRT files to reference B-41A0.INI. Then run install and enjoy your Beats Audio experience. Basically all it does is run SRS HD Audio Lab (now called SRS Audio Essentials) enhancements in a nifty control panel. Confused? Check out this page.