i know the itouch has a low but im not sure if there is even another ipod with a speaker
Just the ipod touches, all I can say is that my 4th gen ipod touches speaker is louder than my 2nd gen ipod touches was.but neither of them have loud speakers, still kind of lowNow my blackberry has a really loud speaker, I don't even need headphones when I am running I have it on my belt and can hear it just fine, where as not the case with ipod touch speakers.
i think the ipad 2 is the loudest.