Sir rochie,
1. Can you post the proposed BOM of the assembler of SMTs (including brand and part number)? A listing similar in format sa diyaudio BOM.. I am interested how our BOM is similar or different from the diyaudio BOM.
2. Duon sa diyaudio BOM, all resistors have 0.1% tolerances (except for 2.2M ohm which is 1% tolerance). According to the diyaudio forum threads, critical is R1 to R8 which should have tolerances of 0.1 % and 10ppm . The rest of the resistors are less critical in terms of tolerance and 1% tolareance might be OK.
3. I am still committed to have my board pre-assembled. But I would like to see first the proposed BOM and how it compares to the diyaudio BOM. As much as possible I wish our BOM is very similar to the diyaudio BOM in terms of specs and tolerances. Their BOM is already well proven by 3 batches of group buys already.
Sir tony, I hope you will still get two bare PCBs