Audiophiles currently have the ability to obtain a wide variety of high-end gear, but connecting components to an iPhone, iPad or iPod touch leaves users limited to the digital-to-analog converter (DAC) built into the iOS device. High Resolution Technologies recently introduced a new product, the iStreamer, that boasts a higher quality DAC. MacNN stopped by HRT's booth at Macworld Expo and listened to a demo with the new setup.