Are my CAT5 and router my weak link?

I have paid a lot of money for my PS Audio PW DAC II with the bridge....as well as all of my interconnects, power cords and speaker cables. After all that, I have an inexpensive (relative to my system) wireless router that connects my computer to the PW DAC and CAT6 cables that are not too special. Are those components letting the signal come through fully? I am curious what others may have done.

Thanks
Jeff