[quote name='Passinwind' timestamp='1420306203' post='2647881']
You might want to look through the Talkbass threads on that amp, thermal issues have been mentioned at least a few times. The latest pics I've seen seem to show a bigger heatsink, so hopefully it's all sorted by now. I'm really looking forward to checking one out, but it's likely to be a few months before that happens.
When I built my own amp last year it was intended just for practice or very low key EUB jazz gigs. At least one very experienced engineer told me I needed to use a fan, but he also admitted to having no experience with the particular ICE module I used, which is not common in bass amps at all, and not the one Demeter uses (the one I used is bigger and more expensive, intended for pro PA duty, and requires more outboard parts). I added some heatsinking just to play it safe, and have ended up using this amp in a few fairly loud rock situations with no problems so far.
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The new Demeters are in a bigger chassis too, as well as the bigger heat sink.