OP, are you sure you are not confusing perceived change in dynamics for change in volume? My current AudioNote straight to preamp tone arm wire is noticeably more dynamic or alive sounding than the previously used Cardas. That, combined with the darker sounding quality of the Cardas can give the IMPRESSION of slightly less volume.
Effects of cables on phono volume
Aside from changes in tome and ability/ inability to reject RF, has anyone found a significant diffence in apparent volume/loudness when switiching amongst various makes/models of phono interconnects ( not those within the tomearm-rather those between tonearm and phono preamp and/or phono preamp-preamp etc).