New Dedicated Line - Almost No improvement

As for running components with battery supplies. I had NEW (Nirvana Electronic Works) DCA66 class a ss amp way back in 90's, early 2000's, ran off four wheelchair batteries, also have Merlin VSM-MM which has BAM that runs off 4 9V batteries.

Point is technology and implementation has been around for some time. Is it game changer? Based on my experience, no, and wouldn't you think audio manufacturers would have caught onto this if it was. Perhaps more battery storage devices with audiophile quality inverters will come to market in coming years, we'll see.

I'd add better sound staging and imaging to @steakster list of improvements. I too use isolation transformer type of conditioning  on everything with exception of amps, amps always go straight into their own dedicated 10AWG line.

@laynes In the end you'll just have to try various PC in order to arrive at your own conclusion. I went through an audition period over a couple years and many PC, a variety of effects, transformer based PC best for me. I'd suggest amps never go on pc based on my auditions.

I have battery storage device I tried on various components, prefer sound from dedicated lines and transformer based power conditioner. The cheap inverters in these devices is the problem, create their own noise/distortions. I assume those built specifically for audio, like the Stromtank have paid much attention to inverter produced noise.

Well, yes these not true dedicated line in the sense of providing your own independent ac line, even a line run from pole wouldn't be truly dedicated as sharing with everyone else on that trunk line.

@richopp takes this thing to extreme, funny! But yeah, we'd have to go to extremes to eliminate all noise on ac lines. Some, I included,  have tried batteries for provision of audio power, but even this has limitations in the sense of noisy inverters.

@lloydc My BPT 3.5 Sig., a toroid only hummed when I had over voltage (122-125v), built c core bucking transformer to cure the over voltage, no excessive hum. Since upgrades by electric provider, now provides 119-121v 24/7 no hum from  transformers in any of my equipment.