I had tried a friends Pipe Audio Dock when I first got my i-phone and it worked great. I bought a protective case for my phone and then bought the Pipe Audio Dock. My phone won't fit on the dock with the protective case, so I had to return the dock.
They are low enough at the top that they don't show but actually stay on my feet.(I have several pairs of different brands that the heel doesn't stay on, so I am constantly adjusting them.) They are now my go to socks.