Rik, I really suggest that you buy a decent set of earphones and try again, they really are awful earphones in every respect. Earrape was a term I heard applied to them and it's fairly appropiate.
I'm not one of these audiophiles that can gnats farting (if I was I wouldnt be using MP3s or an iPod) but even I can hear the difference, though I can still hear (at my advanced years) wether bats are in the area
Apart from poor sound quality, the dreadful fit, low volumes and the amount of sound leakage makes it a necessity to replace the iPod headphones.
Theres plenty of sub £20 headphones that are superior to the bundled ones (cept they don't have an apple logo on them). In the sub £30 range the difference is night & day. At £42 Currys will supply you with Ultimate Ears fuper.fi3 earphones which are brillient at the price.
I do hope that the dual driver earphones are good as I would like an affordable pair of dual driver phones
Methinks the lady doth protest too much (about windows in your case) how about finding something better to do with your time.
Even Paris's orifices would reject apples earbuds