The iPhone is a great device to store your music and video files on. The sound quality is decent if you are using your headphones/earphones to listen to your media files. You could always pick up an amplifier to increase the volume of sound coming out of your device. The ECO AMP Green Amplifier does that and more. It is a simple amplifier that is made from FSC Certified 100% Post Consumer paper. It can boosts sounds levels up by about 30dB.The ECO AMP is very portable and costs only $8.