Tube amps and iPods

Hi
iPod's are the best portable players. It's a fun thing to have when you walk or when you go outside to do something, I think is not the best for the sound it’s for the services and software you get.
Tubes amps and iPod is more a romantic way to think, a tube amp will warm your sound, but that’s all.
I have an iPod and even with AIFF files you can see de difference, now the problem is not the file is the sound card.
iPod are compress files, with so little dynamic, that doesn't matter if you buy the most expensive amp in the world still compress files.
If you have a pipe of 3" then you reduce it to 1" and then you expanded to 3" again, you won’t get more water than the one can go through 1” pipe.
Never forget iPod is a PORTABLE music player, Keep it that way.
Paulo

Just to meke shure that express my self clear.
ON AIFF files yes, you transfer files with the same quality of the CD to the iPod, but I said :
I have an iPod and even with AIFF files you can see de difference, NOW THE PROBLEM IS NOT THE FILE IT SELF IS THE SOUND CARD OF THE IPOD.
The sound card on the iPod is good, how ever far far away form a High-End CD player.
Paulo