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I think you're referring to my post here. But yeah, I'm not surprised at all to read your comment. I think in general the best thing is to be brutally honest to yourself. This can be rather difficult if you just spent another $1K on the next FOTM wunderDAC though.
I think a lot of people WANT to hear something and then believe they do instead of actually hearing it.
Yes, it was your post. I actually only found this discussion yesterday and got through the first 40 pages (phew!) and I remembered yours. Thanks for the impedance charts. I used to own Sennheiser HD600s and I've seen impedance charts for them with a huge rise at 80-100 Hz and I just assumed that all dynamic headphones performed similarly. The Denons impedance does remain remarkably flat - comparable to a planar headphone. Impressive. After learning more about amps and output impedance, I was convinced that my Nova was a POS (as a headphone amp) due to its' 30 ohm output impedance - if the designers did that, what else did they do wrong? Well, it sounds extremely similar to my O2 and Violectric (in sighted A/B listening), so now I know why. I'll just have to stick with Denons and planars!
I think anytime you mix science with emotion (which hi-fi certainly is both), you open the door for "snake oil" sellers. Within the first week of the first Model T Ford rolling off the assembly line, I'm sure someone was selling a silver gas cap to ionize the fuel tank and improve combustion!
Someone else mentioned the 6Moons reviews and I think that not only are they indecipherable, but they are also completely meaningless. Anyone who has taken high school level science knows that in order to prove a hypothesis, you have to test with a large sample, have a baseline, and take measurements - OK, maybe that's not exactly what they teach in high school, but you get my meaning. When I read a review that has lots of flowery prose and lists all the high-end esoteric gear used in the listening room, my bull&*%# meter gets pegged.
I thought the "blanket experiment" referenced on NwAvGuy's blog was a particularly good example of how anyone will hear what they want to hear (or expect to hear).
I agree, great discussion here.