Hi, I'm a new member and newbie to Hi-Fi audio. After many years I returned to stereo sound. I bought a Marantz PM6006 amplifier, a Pro-Ject Box DS DAC, for Jamo S805 and playback from my macbook via usb. When I connect the direct optical cable to the amplifier without going through the DAC I had a distortion problem with the right channel, it produces a constant distortion and low volume. After disconnecting it and going to analog, the problem continues and then it works correctly again. I wanted to know if any member had the same problem and which member can be a member of the solution