If you notice the music they choose for speaker demos? Same also can be said for headphone demos, as a single guitar, harp or vocals. These recordings actually are fond of audible sound color. Where distortions really cause issues is with complex musical passages. We have always had a pair of headphones which do everything good until things get complicated. Obviously the amp speed is important here but if everything is the same some headphones just don't do complex passages. A single instrument can be much more easy to get recorded also. So maybe the recording quality but absolutely the response of world class headphones and speakers is better with the reproduction of a single musical instrument. Even better a harp or guitar where added (color) harmonics make the sound sparkle magically. Lol The driver just has less to do. Still we hearing an instrument with out the sonic pollution of other musical instrument factors adding confusion to the sonic display. The only coherent line source speakers I have owned were the OHM Walsh 2s. http://www.soundadviceblog.com/home-theater/ohm-walsh-speakers-unique-technology-stunning-performance/ They were not totally single point but close. Interesting to read the same issues with expensive speakers as with lower cost speakers. MBL Radialstrahler 101E Mk.II loudspeaker http://www.stereophile.com/content/mbl-radialstrahler-101e-mkii-loudspeaker Thus we get to the real reason why headphones can in certain situations claim better SQ at a fraction of cost. We have single point drivers an inch or inches from the ear. We need not worry as much about reflections and zero concern for room reflections or treatments. There is a single driver so no worry about crossovers or DSP crossovers. Timing is maybe easer as the sound does not travel as far before reaching it's destination. There are still power issues and resonance issues and a whole complete subject in regards to cup placement and an air-tight fit. Still everything is in a way much more simple.