Addicted to Fun and Learning
- Mar 30, 2019
No idea but is worth noting this is "Ver 1.3 Apr 10, 2019" and Amir's original review date was August 2018. So something has changed in the design (for better or worse is anyone's guess).
I can comment on the design a bit. I review electronic schematics and layout for a living, not in the audio world mind you but good PCB design is good PCB design in many ways.
First, the PCB is larger and there is more on it than I would have expected. Obviously this is a huge DAC but I was expecting to see something like a raspberryPi and a DDRC24 in there with cabling to the connectors. The modular raspberryPi like board is there but clearly the meat of the SHD is much more than what goes into the substantially smaller DDRC24. Also look at all those caps!
Second, look at the SHD and SHD Studio layout around the XMOS and AKM chips; note it is extremely similar. Also note those cables which go from one part of the PCB to another part of the same PCB. That is abnormal and suggests the layout in this area was locked before they decided where to put the raspberryPi like device. It suggests they had a well tested, well performing layout and rather than rip it up to fit the extra signals they ran cables instead.
This is all great information. Many thanks.