Had a member send me $30,000 worth of CHORD DACs/Resmpler/Cables for testing. I asked him how fast I needed to test them and to my surprise, he said to take my time. And that he had bought a Topping DAC and couldn't tell the difference between them so he was going to use that until I returned his gear. Who is right? You or him? Measurements demonstrated by the way that the two DACs would sound the same but of course, Topping was more than 30 times cheaper.
I don't doubt someone enjoyed it and, as I said, I thought the SMSL DACs were just fine, but the D90 III sounded like poo to me. I compared the D90 III directly against the SMSL SU-9 Pro, VWV D1se2 and even a Yamaha RX-A8A. In theory, they should have all sounded exactly alike, but they were only 'similar' with their own noticeable faults. Any one of the numerous differences could account for what I heard and, of course, the unit I received could have been faulty. I'm not willing to live with something that I gave a fair shot and didn't enjoy.
Firmware updates are rarely needed on DACs. When they are, they are absolutely provided by the likes of Topping and SMSL. Now, high-end companies, that is another matter.
Firmware updates can be found on Topping's site, but not SMSL's. There are exactly 0 DAC firmware updates listed via SMSL's site. I am aware they're buried in dark corners of the internet, but they're not exactly easily accessible.
The dude you are responding to spent $25,000 on his DAC. The sales tax alone would buy you not one, but two of the best DACs Topping makes! And it is not like he can get support from anyone local.
I'm am huge fun of MBL because their North American CEO invited me to a private audition then gave me his entire evening to listen to their flagship products, which was nearly a $1mil room! I have his business card and can message any time for support, which they'd coordinate with Germany for me. I bought their 6010D preamp ($32k MSRP) shortly after because it sounds great and I like the big shiny gold knobs. It's also a simple design that has remained relatively similar >30 years. Am I wrong for spending my money any which way I please? I'm financially very comfortable in my early 40s, it didn't come out of investments and have $0 in debt.
You can also buy them from Amazon and if there are early mortality, get a refund or replacement.
I'm happy to call out Apos, an authorized seller for those DACs. Nowhere on their sales pages nor listings do they mention their refurbs are "final sale items." You would have to have foresight to actually check their FAQ by specifically searching for their policy, which should be listed on the listing itself:
Apos Certified Refurbished Page
What happens if the unit dies after the return window? Plenty of stories online with people waiting months and paying costly international shipping to get their Topping/SMSL repaired or replaced.