There seems to be a solution from SMSL for the IMD hump on our D400EX. I tried it and sounds great!
V1.01 2023-3-23
Firmware release notes:
1. Solve the problem of non-linear curve during 48kHz IMD testing!
2. Improve performance!
(use at own risk!)...
Someone from SMSL have send me a new firmware to fix the IMD problem of our D400EX. I have no equipment to measure but it seems to sound fine and a little less harsch. Maybe someone here can do another measurement? Flashing worked fine (different method than usb firmware). Use at own risk!
I hear you, but as long as i only have to wait a couple of hours for a solution I'm ok with it. But i only received my d400ex just 48hours ago. Can we call this agile software development? ;) To me it's still worth the upgrade from the d70s
I also had an volume problem with my new d400ex. (Very low volume) Only when playing USB PCM. This was not the case with BT or USB DSD (dop). After sending 1 email to hifi express.. got a direct reply from hifi express with a firmware update (from 3.11 out of the box) to 3.12. Now the volume...
I'm using my topping d70s in my setup. When I don't want to use the my picore Qobuz LMS plugin for finding new music.. I sometimes use a Bluetooth connection with the android Qobuz App. Then to control the volume I use this Samsung galaxy android app 'SoundAssistent' to control the per app...