SO glad there are more of you with WA7's now! Not so glad to hear about these two issues, but at least they are relatively isolated.
The only issue i HAD (now resolved) was i messed with the midi settings, clicking back n forth fast through them all to try to hear differences, and the DAC got angry. It went digitalised on the low end. Since then, (although I think its like this out of the box) ive discovered i dont get ANY sound out of the unit when i first plug it in- unless i reset the HZ setting to 42000 in the midi settings menu, then go back to 192000 and it runs perfectly. Again, i think it was always like this and could also well be my ancient MBP or file type.
I more likely suspect this is a firmware thing, and only a minor issue that doesnt bother me at all. Now that i know what it is, its just part of my process when turning on the unit. Im guessing there will be a download to fix these issues in the future. the
actual amp/dac itself and all hardware and manufacturing are perfect for me! No heat issues (runs quite cool actually), no issues at all really.
Being a gen 1 product there was bound to be some anomalies occurring. The great part about WOO Audio is their stellar reputation for addressing these issues and resolving them with good customer service.
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Just shoot Jack an email. He'll probably give some insight or ask you to send it back. He needs to know if there are problems with these, so he doesn't wind up shipping other units and having more problems (Imagine if no one had told Jason about the issues with the Schiit Magni). If there is something making it unusually warm, he'll probably replace it for free.
EDIT: Make sure you mention you're in Australia and bought it from Addicted to Audio. He'll still support you, but it would be a good idea for him to know what the power situation is.
This is good advice to start with.
I myself am going to also take some of the other suggestions here and buy myself an infrared thermo just to have at home for other reviews etc, i have a lot more gear coming more regularly now.
Carsany: are you running MAC? you may need an OS update to fix the issue, or a simple restart and check those midi settings. Most DAC issues like that are often the computer. If this doesnt fix it try it on another MAC that runs the minimum OS requirement +, failing that you can email Jack regarding a software update.