"William Sommerwerck" wrote in message
...
I am trying to find some ambiant noise killing (cover ear and seal
it), very high sound quality (so I dont need to turn up the volume to
hear faint techno/pop samples that are getting drowned out by the beat
in songs (commercial/mainstream ones)).

I don't understand the point of "critical" listening using portable
equipment.

Not to mention portable MP3 players, like the iRiver. (Maybe the OP is only
thinking in terms of redbook CD's, but as I see it the iRiver's main billing
is as an MP3 player.)

MP3 is a format intentionally designed to take details that are hard to
notice, and delete them altogether... that's called "psychoacoustics" and
it's an important part of how lossy compression works.