Power Conditioning - How Important for Digital and Analog Source Components vs Amp?

For what it's worth I've been told by friends (whom I consider true audiophiles with great listening skills) to use a very good power cord on the conditioner for the best results. They claim that's where they heard the greatest difference. Over the years of tuning various high-end systems, I've learned is there is no one answer that works for everyone. Trial and error and trust your ears.

Thanks, I suppose I will need to do a test of a basic cable connected to my conditioner vs a more spendy one.  Since I can’t swap my high end amp power cord without ruining the test results, I’ll need to find a demo cable to try.  
 

Despite my amp power cord making a world of difference, I somehow doubt the cable to the conditioner can possibly matter as much…. But this is just my unfounded speculation.

Maybe I’m a sucker but I did upgrade to a AQ Diamond USB cable to my Gryphon’s DAC module, and I’m strongly considering upgrading my Ethernet cable to my InnuOS streamer / Roon core.  Even when I can’t actually hear a difference at all in the sound vs a standard $3 USB cable.  I know the Gryphon DAC module has some fancy voltage stabilization and clock sync tech for the USB input, so maybe my AQ Diamond USB cable isn’t needed…..

I hear massive differences with the amp power cord and also when swapping out speaker wire…. Now I’m getting to the nitty gritty I guess.

Thanks, I suppose I will need to do a test of a basic cable connected to my conditioner vs a more spendy one.  Since I can’t swap my high end amp power cord without ruining the test results, I’ll need to find a demo cable to try.  
 

Despite my amp power cord making a world of difference, I somehow doubt the cable to the conditioner can possibly matter as much…. But this is just my unfounded speculation.

Your logic makes sense to me.

If the power conditioner is a cure-all then it should not need a PC on top.````````````

I am using the same high quality power chord into my PowerCell conditioner and from the PowerCell to my Diablo 300.  The combination was decided upon after  different manufacturers, variations, and combinations were employed in trials in the actual system.  As far as the Gryphon Diablo DAC module, even though it is run off its own isolated capacitor bank power supply it does perform better with a quality USB cable from a quality server.  It was very revealing of the different USBs that were tried and the one I found best in my system was not the highest priced that was employed in the trials. It is a great amp just feed it well and it will reward…

One of the most audible improvements in SQ was using a 8awg OCC PC from wall to my Equi=Core 1800. A 20A dedicated line to service panel is the point of origin. IMO, you need a large gauge PC to a toroidal conditioner to keep enough power on demand. Same goes for the power amp.