Depends on the design of the DAC. If they are using the chassis to dissipate the heat, it may well run hot. The best bet is to find someone who is using the same unit and get a chassis temperature measurement - what is "hot" will vary from one person's judgment to another. If you cannot get to the company, and it works ok, I would not worry about it. However, If I couldn't get hold of the company, it would be the last piece of gear I bought that had their name on it.
