I was mostly talking about DACs and amplifiers, not headphones. Headphones have to deal with more trade-offs: comfort, size, isolation, and the fact that it&#x27;s really hard to get them to accurately reproduce sound. Still, so what if current headphones suck at reproducing sounds? That doesn&#x27;t mean we should ignore quantitative measurements. If the &quot;right&quot; inaccuracies are so subtle-yet-crucial, it&#x27;s important to quantify them! Then we can evaluate headphones based on how accurately they create those inaccuracies.<p>And I think you&#x27;re missing the point of the EQ experiment. NwAvGuy wanted to see if there was more to quantifying headphone quality than a frequency response curve. He was right. That just means that objective evaluations of headphone quality will need to include more measurements. That doesn&#x27;t mean we should disregard measurements and go with subjective impressions. Otherwise, something as mundane as a warm drink can skew the reviewer&#x27;s opinion.[1]<p>1. <a href="http:&#x2F;&#x2F;news.bbc.co.uk&#x2F;2&#x2F;hi&#x2F;health&#x2F;7688315.stm" rel="nofollow">http:&#x2F;&#x2F;news.bbc.co.uk&#x2F;2&#x2F;hi&#x2F;health&#x2F;7688315.stm</a>