Simple solution

A tunnel-like hole runs from the iDevice's speaker to the base of the horn. You can see that hole here. You can also see the handmade quality of the wooden base. The somewhat rough-hewn look of the actual dock may make sense with the aged gramophone horns and brass instruments used. As ReAcoustic's Boase says, "The dents and scrapes add to the charm and character of [a horn], as you can tell it's lived a full life."