attack I can understand but still fail to see how pace and rhythm apply to headphones
From my experience of headphones while they render the same material the same way it does not always equal the same timing. JUst like Grados and sennheisers sound different to each other even though they may reproducing the same track.
Take something esoteric like the sony Qualia 010 or to a lesser extent senn he60 as soon as you play a track on it it blisteringly fast and by that I mean Leading notes and decaying notes start and end very quickly. And the overall impression is an exhilirating listen but to some including myself a fatiguing listen.
Other headphones pale in comparison save for a very select few. When I had the Qualia 010 once you get got accustomed to how fast the headphone sounds then switching to any other headphone all of them including headphones like he90's, R-10's. Stax O2's all sounded much slower. And if you switched to headphones like 650's and Rs-1's etc it sounded if someone had slowed the sound to such a degree it was they were like broken.
But something like the Qualia 010 is a one off technical showcase rather than a muscial headphone for the masses. They were only made in limited numbers. Had a high price not to mention you had to go into the Sony store and have your head measured to have the right Qualia Headphone size for you.
There is also another explaination or theory and that at the time that I had them there was a Placebo effect and it was not the most resolving, transparent and the headphone with the fastest attack of any headphone regardless of cost or equipment used. I have used it out of emm labs, mark levinsons, burmesters and it always sounded the same.
Hands down the fastest, most resolving headphone and most transparent headphone I have heard and that was like what 10 years ago? I can''t remember. Damn it rids you got me rambling!