Replacing generic RECEPTACLES

@tattooedtrackman,
No, u don't need to install a 20A line for a CDP. But since your 15A AC line is native to your house, I'll bet there are other wall outlets with devices or appliances tied into that circuit. IOW, it probably is a shared line with noise being introduced from the other devices.

 And since u now have a 20A Furutech duplex receptacle, it makes sense to run a new 12 gauge line with new breaker. As Elizabeth explained so well, your CDP doesn't care if the circuit is 15 or 20 amps, it only draws the amount of current needed. 
But, in the future if you add more components to your system, you may wish you had installed a 20 amp circuit.

When i had construction done to my 2 bed rooms upstairs in my home back in 2009 , I wanted one big huge room with raised ceiling and 3 sky lights with 2 dormers. New hardwood tongue and groove floor. Fuji split zone AC on wall. Hard wood tongue and groove floor. 2 ceiling fans. 3 ceiling high hat flood lights with dimmer switches. Hard wired smoke detector. And about 12  15 A receptacles. Upgraded from 115v to 220v for home with new breaker box and breakers. Thats why i thought of running a dedicated 15A or 20A line for my CPD. This work was all done before i had any thoughts of putting together my stereo system. Since then i have only added the dedicated 20A circuit double gang box for my Krell FPB 600 and ARC Ref 6 . 

Audio Advisor has excellent ones builtvery solid 
bronze for $25,or gold plated Copper $50 
both high on conductivity index ,and nightandday betterthen Any 
crap your house comes with,as well as better then anyhospital grade which is brass, bronze has 3x better conductivity ,Copper 4x , Just lookup resistance index online .

Did u see my post above stating that the line for your CDP is most likely shared?
If so, then you need to run a dedicated line.