Schiit DAC Crashes Audirvana

Please also ensure your Audirvana is updated to the current release.   I still think emailing Schiit is your best option.  

I've tried all of the above including emailing Schiit and gotten zero response from them. Other than sending it back and calling Amex to initiate a charge back I'm stumped.

In my experience with internet companies, they typically have a smaller staff to keep the costs down on their products.  Ascend, Hsu, Emotiva and Schiit are the ones I've dealt with.

The problem with a smaller staff is, when a new product launch is underway( or some other really busy time), customer service takes a dip. It's not a good way to treat customers, in my opinion.  But there you are.

In this case, Schiit has recently released not one but two new products, and is trying like mad to keep up with orders and keeping the new products in stock.  That's probably why the delay in answering your email.  I'd email again, politely asking for a response.  I'd hit them with 3 or 4 emails. 

 As suggested above, you might contact Audirvana too, since the issue might be known to them.

Also, you don't mention if the DAC runs fine when not employing Audirvana?

I would also suggest not sending it back.  All ID companies insist on having a return authorized first.  If you send it back, they might just refuse it, not knowing what's going on.

Schiit has always been prompt with inquiries, for me. 
I would try to call them directly, if possible.
Please don't give up on them. They are a stand up company and will do right by you.
Bob