It looks like it might be a switching amp since my google search produced a webpage noting that it got an "Energy Star" rating. Also, no heat sinks and very little in the way of ventilation through the top of the case. Could be a fan doing the work but I'm thinking this is a next gen digital amp.
New SS Integrated from ARC DSi200 ...
...MSRP at $5,995. Has anybody heard this yet? Interested to hear from existing ARC amp owners who might have switched over to this new SS amp from ARC. Here's a link with an overview of the new amp from arcdb: http://www.arcdb.ws/DSI200/DSI200.html