Sound Warm, good bass extension, quite sweet highs, quite balanced sound, probably with slightly emphasized mids, not airy, recessed 300-500 Hz and 7-8 kHz. I think that the sound signature is quite similar to Audio-Technica ATH-ES10's sound signature but it's more mid-centric and not airy. The clarity is very similar too. I like the mids that are really natural. So if I can say that the ATH-ES10 is the ideal portable headphone then the ATH-ES88 is almost ideal because I think that the difference is not big.   Comfort and build The build...