Modem performance and modem selection.

The output of your cable modem is likely ethernet, so isolated at some level. The power supply would also likely be an isolated 2 prong class-2 supply. Not perfect, but pretty good.

Modem - Router - Some audio equipment. To Miller’s point, all buffered, so you are either getting it, or not, and it will be bit perfect (which the CD may not be .. but likely is).

Thank you all for the help...If there are any other comments they will be greatly appreciated By J.

Comment on Ethernet Cable directionality. Yes, I know what you’re thinking: Are you out of mind?

from AudioQuest page on Ethernet Cable (Diamond),

RJ/E Diamond prepared Cat 7 Ethernet cables use solid 100% Perfect-Surface Silver conductors, which completely eliminate strand interaction, one of the biggest sources of distortion in cables, for clearer, more dynamic and involving sound. Superior conductor metals minimize distortion by having fewer grain boundaries and less impurities (such as oxides) at those boundaries. Solid High-Density Polyethylene (PE) insulation helps maintain critical signal-pair geometry. Of course all AudioQuest Ethernet cables honor the directionality inherent in all analog and digital audio cables; arrows on the jackets indicate the direction (from source to destination) for the best audio performance.

Steakster, I would like to get your input on choosing the proper LPS for my setup.  What would be the best way to accomplish that?  Relaying all of my equipment and how it is setup will be cumbersome using this format.  Let me know what information is needed and I will be happy to supply that.....Thank you.