Mobile phones and devices aren’t made for the audio output that you desire from them, but I’m sure you’ve never thought of actually using an amplifier for your tunes. NuForce has and they’ve made it easy for you to take advantage of their ingenuity with their Mobile Music Pump amplifier that will increase the sensitivity of your audio output from your mobile device, allowing your Over-Ear headphones to show you what they’re really made of. $US60
