It's a high quality USB DAC, a network music player, and a headphone amp. If you install your own internal hard drive, the N15D is also a storage device. As a DAC and network music player, it excels with digital music file formats. Hi-res music files are supported, including DSD (DSD64, DSD128, DSD256), 32-bit/384 kHz PCM files, and 24-bit/192 kHz HD WAV/FLAC files.
Using the N15D as a USB DAC, you can connect it to your PC or Mac with a USB cable and play files on your computer via the N15 and enjoy wonderful sound quality. In this new D model of the N15, the rear panel USB ports are super-fast USB 3.0, backward compatible to USB 2.0.The built-in DAC is a high performance Sabre ES9018K2M Reference DAC.
The N15D also functions beautifully as a network streaming node designed for your existing DAC or amplifier. It will give your existing audio systems wonderful networking ability. And if you install your own hard drive inside the N15D and connect N15D's USB device connector to your computer via USB cable, the N15D excels as an external USB storage device.