Extremely disappointed with Massdrop on this purchase. I would not suggest buying any Massdrop made product since there customer service is a joke.
My O2+SDAC Amp/DAC stopped working after 5 months of purchase. The O2+SDAC still looks brand new since it just sits on my desk all the time. I tried to contact Massdrop about the warranty and they offer me either to return to get a refund or to replace it with a new one but WITHOUT a renewed warranty. When I asked for a refund, the customer service just disappeared. I tried to follow up but get no respond. Pathetic.