experiment with isolation??

I've used a few different products. I had good success using an Acoustic Revive RST-38 board under my Ayon CD-5s. The sound become more natural, liquid and lively. I've also used Wally feet (similar to Harmonix tuning feet) which are quite good. When I set up my system soon I will be placing my cd player on a Taoc SCB-RS50G board on factory spikes/cups on top of the top shelf of my Taoc rack. Next year I will probably replace the top shelf of my rack with the heavy Taoc iso board & place my player on a set of 4 Stillpoints Ultra 5's. Stillpoints are really the best iso feet you can buy if you have the money.

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First step to problem solution is problem identification ... I think your missing two thirds of the issues that need to be addressed

In addition to injecting noise back into the power line ..

RF or airborne noise is ballooned into the surrounding area where it can re-couple to your equipment regardless of what type of filter you have on the power cord .. this airborne noise is created by the normal operation of your digital components and after your power cord conditioner

A third type of interference is high frequency noise that is created by your digital component’s normal operation and couples to the analog signal through the power supply and is output to your preamp

Some possible solutions ...

For your power cord/line you need a good quality Bi-directional filter that will filter the current coming in from the wall and also filter the current on the return cycle/leg so it is not injected back into the circuit ... this is alternating current that travels in both direction through one cycle through your power supply

I’ve used the MIT Iso Z and found it very effective .. the improvement it brought was immediate and far from subtle ... but it couldn’t deal with the other two issues

I currently use two Foundation Research LC1’s , which are bi-direction filters that are not transformer based like the MIT Iso Z ... the LC1’s are a combination power cord and filter so it’s was easier to use them instead of using up rack space

The LC1’s seem just as effective and are more convenient in my set up ... I’m sure there are other digital solution .. you have to do some shopping on the net

I read one of your other posts where Steve was speaking of the importance of filtering the ground through an isolation transformer to help ... if you take a look under the hood of your CD player .. Dac .. Flat screen and/or cable box/DVR box ... you’ll notice that there is no wire connected to the safety ground lug on the power IEC inlet ... they use double insulated power supplies with no ground wire ... they contain the fault with in the power supply ... if there is no ground wire going from the IEC to the component’s power supply ... do we still need to filter the ground wire .. ?????

Next is airborne noise .. this noise is created from the chips switching on and off at high frequencies .. you can cover the chips with RF blocking tape to help reduce their emission (I’ve done this ) .. or a more effective method I now employ is installing an Audio Magic Next Gen Plus module inside the player/dac ... the Gen Plus generates a signal that is the same frequency and amplitude as the offending noise but is 180 degrees out of phase with the noise so it cancels it by being equal and out of phase ... it’s like a sponge soaking up the RF before it can balloon any further

The last place to look for interference is on the analog IC’s .. high frequency noise will couple through the component’s power supply to the analog signal and be carried forward to the next component on the ICs were it will be amplified by the next stage

In the past I've used a product from the Great Northern Sound Company (GNSC) called a PASI (Passive Audio Sound Isolator ) .. basically a circuit built around two Jenson Isolation transformers which captured the high frequency noise riding on the analog signal

In my system I found that addressing the power in both direction and treating the airborne RF greatly reduced the noise the Cd player (Ayre D1ex) developed and the PASI had little to no effect and was removed and sold

I think you can now see the problem with noise created by are digital components is of a broader scope than you might have initially thought

“Experience is what you receive when you didn’t get what you Expected” .. ;-)

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Thanks zd. I will look inti cable company offerings.

Thanks Tboooe.
Do you have both analog and digital on your PS Audio P3?