ProtoDAC TDA1387 X8 project

[hifinet]

After changing cheap WIMA and Mundorf MCap capacitors to Jantzen Audio Superior Z-Cap magic happens, the sound has gained an additional dimension, these capacitors are very musical.

Now I would like to use good I/V resistors, will Charcroft Z-Foil 430R be good, have you tried other precision resistors like Vishay Sfernice precise 0.01%. Will there be a big difference compared to Dale metalized resistors?

Precision resistors are not really needed, and they will be a waste of money. Foil resistors must be trimmed to obtain the correct resistance value. Charcroft Z-foil should be the same as the Texas Components Z-foil. I think Vishay make Z-foils in Israel. 430R is close to the upper limit of resistance. Some modules may clip with a 430R I/V resistor at 5V supply. The kit uses a 420R value. For a standard value resistor, 390R would probably be a better value. Output will be 0.6-0.7 dB lower compared to 430R. The power supply coupling caps may need to be slightly larger in value to compensate.

The common characteristic of the best sounding I/V resistors seems to be noninductance. The Caddock TF020 thick film resistors have been reported by others to be very good in a similar application, but they are huge. Some preferred the Caddocks and others the metal foil. I think that other thin or thick film resistors would certainly be worth investigating.