Making sound effects sound better when played through an iPods speaker

Hi.

I am trying to create some sound effects for an app. They sound great when played through my monitors but when I play them through the iPods speakers they sound really tinny.

How would I rectify this issue in Audition? How should I output the sfx? Do I add more bass to the original sound file or am I just aiming too high?

I realise I will not get 5.1 Dolby surround out of a iPod speaker but if I could get rid of the tinniness I would be happy.

Thanks
R.