Due to the comments, Here is the " English to Head-Fi translation ":
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On Head-Fi, due to the presence of many newbies (which is a good thing), most of the talk about headphones is regarding bass and treble.
However, if you only pay attention to the amount of bass and treble, you miss the more important differences between headphones (amount and quality of small details, realistic individual instrument sound, i.e. "timbre", overall dynamics, crispness of attack, lack of after-ringing).
So, don't pay so much attention to bass and treble quantity, since you can take care of that in a good digital software EQ, such as a VST plugin for Jriver or Foobar (or use Jriver's built-in parametric EQ).
The real benefit of the Mad Dog and Alpha Dog is the clean response at all frequencies. There is a minimum of blurring of the sound by after-ringing.
Some people are so used to the excess sound energy created by poor drivers with mediocre tuning, that they find the Mad Dog or Alpha Dog "dull" and "slow" when in actuality, they are hearing more of the original recording, because all of the false extra sound energy created by the after-ringing is obscuring the small details. But that false extra sound energy at the end of notes is "exciting" - it sounds "bright" and "zippy", and so losing that false crap seems "dull" in comparison.
(That false sound energy is like going to a Walmart or Best Buy and finding that the TV sales guy has turned up the color and sharpness too high on the TVs, because it looks eye-catching at first glance.)
I hope that is helpful to some...