Human interface issues: https://www.superbestaudiofriends.o...nts-stream-of-consciousness.9318/#post-301203 Effect of filters explained: https://www.superbestaudiofriends.o...nts-stream-of-consciousness.9318/#post-301219 Subjective impressions: https://www.superbestaudiofriends.o...nts-stream-of-consciousness.9318/#post-301395 Typical measurements: https://www.superbestaudiofriends.o...ream-of-consciousness.9318/page-2#post-301703 IMD stuff: https://www.superbestaudiofriends.o...ream-of-consciousness.9318/page-3#post-301778 CONCLUSION: https://www.superbestaudiofriends.o...ream-of-consciousness.9318/page-3#post-302654 I'm jumping ahead of myself, but I am not impressed. It's like turning back the clock back to sigma-delta nasties of 2010 (sssshhh, sssshhh, sssshhh). If you want the ultimate expression of the AKM sound, get the RME ADI2. If you want something very close to that kind of sound for x10 less money and don't need the RME's features, get the Modi 3. Topping couldn't do anything with the AKM4497, two of them, which is AKM's second to TOTL chip. This will be one of those stream of consciousness / ongoing reviews because I would like this to be complete. Perhaps my initial impressions were wrong and I can revisit. Current and prior owners can chime in if I am missing something, and readers can make "requests" as usual. Topping D70 (x2 AKM4497) with AKM4490 based Modi 3 to the left (both in back) One particular annoyance is that the DAC by default is set to only work from the RCA outputs. Evidently there is a relay that allows the outputs to be toggled from RCA to XLR to RCA+XLR. The front panel interface seems simple enough, but for several minutes I could only get it to toggle sources (AES, SPDIF, USB, IIS), but not toggle the output to XLR. I found this highly annoying as practically every DAC in existence will have both sets of output active. Obviously, the next step was for me to consult the instruction manual. As I am not a retired one-percenter, I really don't have time for this shit. Grrrr. Front panel is elegant with SEL, forward, and back buttons. Anyway, if someone can tell me how to do the output select without using the remote, please tell me. I'm assuming Topping put a relay in there to max out THD+N / SINAD and SNR.