Headphones are bad for hearing as is... adding extra stuff will just screw you more. Just do some googling about hearing loss and headphones, it turned me away from "portable music" years ago. I'll just stick to my $1000 hi-fi system. Headphones are especially bad cause high frequency intensity dissipates over distance with normal speakers, but it only has about an inch or so with them 'phones. So even at the same decibel level, you're worse off with 'phones (or so I heard, better safe than deaf).