The model I used for my Mad Max headphone project is an old Sony pair that I bought in the early 90's. Really good sounding set that a lot of audio engineers use when they're mixing sound. I don't care what anybody says, a good pair of Over the Ear phones sound better than earbuds, a bit louder too.

If yours aren't loud enough, there are volume boost Apps that you can download to your smartphone. I use "Good EV."