Remember, when buying a streamer you are buying a package. Hardware and support. The best hardware is junk without good software to control it
The frustrating part is it’s not my A6, it’s my Dad’s. I told him to buy a Bluesound , Innuos , or Aurender. He bought into the hype. Several morons on their forum thought I was an idiot for not letting summit swap it .... that would only leave Amir with another bad unit and me with no resolve. It’s not "broken" , their engineers apparently don’t understand the importance of updates being cumulative and including all device profiles from previous updates.
It cost me $100 for a work around, a Coax . If he had a large DSD 128 or higher collection he would be out of luck with no USB.
Their support is go to some site not even affiliated with them , McBluna.net and find older versions of FW to roll back FW. This contradicted their initial response which was rolling back firmware is "dangerous" They blamed ancillary devices and cables. Their firmware caused no USB out immediately after reboot.
I completely ripped them on their forum and targeted Instagram ads and someone supposedly from Eversolo finally reached out. Too late, would never buy or recommend an Eversolo product. Decent box , terrible support. Real POS outfit.