I was pretty happy with my brand-new Wiim Pro, until I tried playing a high-definition download of a record with a lot of bass content. Sounded like my speakers we destroyed. I redirected the digital output to another DAC I own: content played fine. I was somewhat bothered about this but the next morning a light bulb went off in my head. I rerouted the USB cable from the 2.4 amp (POS) power supply that came with the Wiiim Pro to a 30 amp USB supply. Voila, that track and all other since have been decoded without any weird behaviors. I am sure that this gadget doesn't draw anything like 30 amps of course, but a robust power supply makes a big difference.