I have two 20 amp dedicated lines for my audio equipment . One for the analog stuff and the other for digital stuff .
I then used hospital grade duplex receptacles , two for each line . I am now ready to do another dedicated line for the new tv going in for HT .
When you do the dedicated lines , have them done with an isolated ground system . This way you won't suffer from household interference . Things like florescent lights , refrigerators , hairdryers , microwaves etc. can cause noise in the system . This noise is particularly offensive if you have tubed equipment and/or high efficiency speakers .
I Googled 'isolated ground' electrical systems to familiarize myself with it . Then I called an electrician and used my google knowledge to make sure that he did know what to do . I had to let one electrician go because he did not know how to do it . I then wound up having to hire a commercial electrician . Make sure that the isolated ground system grounding rod is at least 6 feet away from the original household one . A few electricians get kind of funny when it comes to installing ground rods . I have seen a few cut the rod in half so that they didn't have to spend a lot of time and effort trying to pound in an 8 ft. rod ,
especially into rocky soil !
And I have tried an aftermarket power chord on my CDP . It made a noticeable improvement .