My innuos pulse mini is at 100% and the selected dac controls volume output, either to amp or pre-amp.
Some dacs have filter settings where the dac volume control is “bypassed”(?) and is 100% and that is for use through a pre-amp. (Ie, gustard r26 dsd direct)
I absolutely hated wifi.. media converter at router, run long lengths via fibre optical, then media converter back to ethernet and a, very, short cable to innuos. Only spent about $100 and the sq clean up is great.