I, on the other hand, don't know nearly as much as John when it comes to equipment, but know a little about iPod connections. How are you connecting the iPod to the amp?

Does the amp have a dedicated iPod dock or are you using a cable connection? If a cable, what type of connection...through the headphone jack or a USB/iPod jack connector?

My experience is that connecting to an amp through the iPod headphone jack does not provide sound as good as through a USB/iPod connection.

Also, on your iPod, go into Settings and make sure that the Sound Check is Off. Having it on will compress all your files and they'll sound like crap.

Lastly, you could try playing with the EQ settings on your iPod (also in Settings).