I've actually listened to MSBIII and got simply a headache after 5 minutes and so figured that it's not the DAC for me.
1. I would not advise to enter MSB line since even instead of upgraded or Nelson versions you can get Bel-Canto EAD or Theta(maybe used) with far better results and certainly the built quality. So if you can just get back your bucks do not hessitate.
2. Most-likely in your DAC there is a malfunctioned relocking mechanizem and I would NOT advise you to play it through your system since it can damage it.
3. A dedicated transport is always easier "load" for the DAC and thus better works with DAC. Simply choosing a descent one-box CD-player can solve many problems since few out of many cases you won't face an integration and/or matching DAC/Transport issues.
1. I would not advise to enter MSB line since even instead of upgraded or Nelson versions you can get Bel-Canto EAD or Theta(maybe used) with far better results and certainly the built quality. So if you can just get back your bucks do not hessitate.
2. Most-likely in your DAC there is a malfunctioned relocking mechanizem and I would NOT advise you to play it through your system since it can damage it.
3. A dedicated transport is always easier "load" for the DAC and thus better works with DAC. Simply choosing a descent one-box CD-player can solve many problems since few out of many cases you won't face an integration and/or matching DAC/Transport issues.