Did you measure the DC offset on RCA outputs of the Tone Board?
I would very much like to know if there is any offset or if this DAC is well behaved with clean 0 on both channels.
Maybe if any owner is kind enough to test their board…
The power supply chip we use for the AMP (amplifier) has a fixed voltage, there is no external resistance error. The error is at most +/- 0.01V. The ripple voltage of the decoder's LDO power supply is about 8mV. You can use the Tone Board with peace of mind, thank you! (Note: Do not use with older computers, as they may have noisier mainboards).