Was that the first time you moved your cables in some time? this would -could effect sound quality because if your cables have not been moved in a long time your basically reseating the cables and cleaning off the corrosion and making a better connection. always remove your cables periodically for this reason. Also before you evaluate new cables reseat you old ones first so your not taking in the cleaned contact surface as the new cable sound.
one thing we don't seem to think much about is contact corrosion from dissimilar metals (silver and copper, copper and iron for example). also copper corrodes quite fast on the surface.