On the flip size, they are a great headphone amp

This is a"wireless" system, which is plugged into a wall socket for power, and can be played back via supported USB-A (flash drive; MP3, AAC, WMA, WAV, AIFF, FLAC, ALAC, DSD via supported MSC), USB-B (w supplied USB cable to your PC, for example; PCM and DSD), headphones (adjustable gain) or Bluetooth devices

Pros: Appearance, sound quality, imaging, digital conversion, and headphone amplificationCons: High frequency clarity, lack of analog inputs