"Breathing" of the air

The more air the better....resolving and transparency ability dictate the anount of air present. There is air around and between instruments and then the movement of air through instuments and vocalists. So I think the amount of air signals more tonal quality...Every part of a sound system effects what is heard...so high quality well matched systems will excell.

SET amps, very coherent speakers that image well. Other amp designs can do it as well, I just think its more inherent to the SET sound. Clean AC is an absolute necessity as well.

Air is around 7 to 12 Khz - if you have a system that boost this then you get more "air" - alternatively if you have a speaker with a recessed midrange or "midrange scoop" then you get more air and more bass (boom boom tizz).

IMD distortion, digital hash (jitter) and metal drivers that ring can destroy air by giving it a heavy "etched" sound that is not properly related to the musical context.

'Air' is one of those things that, IMO, all audiophiles think that they are talking the same meaning, when I think you will find that there are several predominate meanings.

For me, 'air' is the ability of speed in a system, in a way that allows for good high frequency detail without harshness. This allows for the reproduction of subtle high frequency cues , part of the harmonic structure of the instrument(s), but also the higher frequency ambient cues that are part of the instrument(s) location and reverberant field in the soundstage.

Systems or equipment that lack this ability can sound either dark or bright; 'air' is not a function of simple tonality. Generally though if the system is bright, it will seem so while at the same time not seeming to have much extention on top.

I would not take my comments as the last word on this subject and I'm interested to see others opinions on the matter.