Christopher Locke buys old trumpets, trombones, and French horns and transforms them into acoustic amplifiers for iPhones and iPads. His creations are modeled on the trumpetlike speakers used in the first phonographs during the late 1800s. Music played through Christopher’s AnalogTelePhonographers has a “louder, cleaner, richer, deeper sound” than what is heard from the small speakers in the digital devices. Along with being interesting works of art, these salvaged brass instruments require no electrical power as they amplify the music people love to hear.