ProtegeManiac
Headphoneus Supremus
If those graphs were done with sinewaves or any similar test tone, that's why they're "useless" (note I put that in quotation, before anyone calls me in on that) in how they sound in the real world because real music doesn't sound anything like that test tone. When it plays through one freq on a test tone, it's playing ONLY that freq, not a wide range of freqs at any given moment where the drivers would have to move differently in order to play them all. This doesn't mean that these test tones are totally useless. I still use test tones to map out time alignment and graphic EQ settings on my car's audio system, but even then I leave a little spike in the 2khz to 4khz region (to keep the vocals forward) while taming any spikes in the 5khz to 10khz region (to tame sybillance).