I greatly respect NwAvGuy and agree with almost everything he says, but I think in practical terms that&#x27;s a slightly over-simplified perspective. Look how inaccurate even these headphones are [1], arguably the best or one of the best ever made.<p>Getting the inaccuracies to be the <i>right</i> inaccuracies is quite subtle and very important in my opinion. See for example this review of his [2] and in particular the paragraph near the end:<p>&gt;AN EQ EXPERIMENT: I tried using highly configurable parametric EQ to tweak my Denon D2000s to be similarly forgiving and I failed. When I filter out equivalent amounts of sibilance and harshness with the Denons, more of the music is gone and the result sounds veiled and artificial. The HD 650, to my ears, somehow works more like polarized sunglasses. They largely remove what I don’t want while revealing more of what’s left. It’s not just a simple frequency response difference. My objective side wants to pin down what’s going on but I don’t have a full explanation besides the HD 650’s lack of distortion.<p>[1] <a href="http:&#x2F;&#x2F;www.innerfidelity.com&#x2F;images&#x2F;StaxSR009.pdf" rel="nofollow">http:&#x2F;&#x2F;www.innerfidelity.com&#x2F;images&#x2F;StaxSR009.pdf</a>
[2] <a href="http:&#x2F;&#x2F;nwavguy.blogspot.co.uk&#x2F;2011&#x2F;06&#x2F;sennheiser-hd-650.html" rel="nofollow">http:&#x2F;&#x2F;nwavguy.blogspot.co.uk&#x2F;2011&#x2F;06&#x2F;sennheiser-hd-650.html</a>