Direct lines and adding a power conditioner

Audiolabyrinth - I would NOT be in the habit of telling people to wire their circuits with dedicated grounds in direct violation of most residential electrical codes. Certainly you CAN wire things this way, but it is not going to meet code and could potentially invalidate your (homeowners) insurance. Additionally, the use of dedicated circuits does NOT mean the AC each circuit is receiving is clean, just that it is CLEANER than a non-dedicated circuit. The quality of the AC depends not only on the quality of the ground, but the power entering the residence from the power company and also how well the rest of the panel is distributed.

@ Jwpstayman, Hi, If you have a dedicated circuit breaker box with this scheme, It meets code nation wide!, This scheme drops the noise floor hugely in any circumstance no matter where you live or what grade of power you get from the power company!, Done right, all breakers work as designed!

Audiolabyrinth - not to belabor the point, but if you check the electrical code for residences, ALL circuits must have a single point of ground, which is the panel ground at the service entrance.

Jwpstayman, that is not true if you have a dedicated breaker box just for your audio recepticles, I can also add, there is no federal code!, what might not be code in your state, does not mean its not code in my state of alabama!, my set-up has been approved!, thus no need for some over priced multi-thousands of dollars line conditioner!, I will also add, It is very cheap to have an in wall surge protector for the lower power componets, LOL!, there is no sure protection that can handle a Krell 700cx amp!, I unplug the amp when It is not being listened to, thats the best cheapest protection,LOL!