Small device for big sound – With the digital analog converter Nuforce DAC80 and the class-D amp STA120 Optoma has succeeded in developing an audiophile symbioses. These units fit well together thanks to the space-saving format and discrete design. In terms of sound reproduction, the examines persuade with  great passion on detail and most transparent playback of different resolution, no matter how high/low the volume is set thanks to the 32-bit rotary. Both devices represent a worthwhile purchase.”