Aqua Headphone Amplifier
Some devices can't drive larger headphones. Some have crappy DACs. The Aqua Headphone Amplifier is designed to solve both these problems. It connects via Lightning or MicroUSB and uses a 24-bit/192kHz DAC from AKM to provide excellent audio quality, as well as a 60mW amplifier to make sure your cans are getting plenty of power. There's also an onboard USB audio controller, a status LED, and a play & pause button, all housed in an angular machined aluminum case weighing just 16 grams.