Dedicated line, how many outlets two or four?

I ran one 12 awg wire to one Cardas 4181 wall plug. plugged the Saturn 103C conditioner into the wall, then all of my components into the conditioner. 

I did two circuits because it was as much work to do two as it would for one, I did 20 amp circuits with 10/2 Romex, audio grade receptacles and power conditioners plugged into each circuit. My amp is plugged into one circuit and everything else into the other circuit. It made a significant difference.

Three circuits for my main system. All 3 are 20 amp, 10-2 romex, using high quality medical outlets. Two outlets per circuit although only one gets used.

One circuit is for the sources all plugged into s PS audio P12.

Each power amp with sub have their own circuit and each are plugged into PS audio P20's. It is primary overkill but WTH.

We were redoing a basement and we added a sub panel. Because the cost difference was minimal, I added 5 dedicated lines. 1 for the monoblock amps, 1 for preamp, 1 for digital, 1 for subs, 1 extra, along a side wall, in case I am able to get my gear out from between my speakers and along the side wall. 

Sub panels, especially with long runs, are the way to go.