There's really only one way to find out... sibilance could come from your source before DAC. For interconnects, I recommend either Blue Jeans LC-1, canare L-4E6S, or Signal Cable Analog One or TWO.
With these, you are sure to get really good cables at the right price. Of course, you could spend hundreds more for better (hum) or for worse, i.e. AQ, Kimber, ZU, or iBELIEVE xr26gold with super secret B3 technics.
With these, you are sure to get really good cables at the right price. Of course, you could spend hundreds more for better (hum) or for worse, i.e. AQ, Kimber, ZU, or iBELIEVE xr26gold with super secret B3 technics.