I listened on surround sound speakers w/ a sub. I think my ears only are able to process the quality of bass (years of urban stanning I guess) because I got the WAV files right on Tom Ford and Dark Horse and that Neil Young song that had really low tones, but got 320 on Tom's Diner and Mozart and 128 on Speed of Sound.

I did it a second time and got the WAV files on only Tom Ford and Dark Horse again. Pretty accurate assessment of my ears since the bass richness is usually the thing I look for most; I will toss or give away some headphones in a sec if the bass doesn't really kick the way I want it to.