Try something different than the Rega cables. As much as I think in general that Rega is a good brand, I was not impressed with their cables at all when I heard them. On the system I heard them in initially, I was not impressed with the system until the cables were swapped out for another brand. The difference between the two brands in terms of sound quality and overall clarity was huge. Borrow some other speaker cables from a friend to try.
To answer your other question, the coaxial digital interconnect can definitely make a difference ... without a doubt. In a system like this, it is one of the most crucial cables since absolutely everything for the home theatre audio signal is riding on this cable. I'm not sure what digital interconnect you're using, but definitely try the different speaker cables.
To answer your other question, the coaxial digital interconnect can definitely make a difference ... without a doubt. In a system like this, it is one of the most crucial cables since absolutely everything for the home theatre audio signal is riding on this cable. I'm not sure what digital interconnect you're using, but definitely try the different speaker cables.