Advice needed on power cables, wall warts, conditioning, electrical outlet

Speaking of power, have any of you experienced Furutech's in-wall power cable, - FURUTECH ALPHA-CB10 Power Cable OCC Copper Alpha Treatment 6.23mm² Ø5.5mm?

It is really more like a hook-up wire in that it is a single run, meaning you would have to double up for power or speaker cables.  However, it provides a lot of their top OCC alpha copper for not really a lot of money.  At about $43/meter you could do a 2M, 10awg power cord for about $170 plus plugs, or two 8-foot, 10awg speaker cables for $430 plus connectors.  The XLPE (Cross-linked Polyethylene) insulation/covering has a relatively low dielectric constant of 2.2/2.3 compared to Teflon at 2.1.  I can't seem to find this cable available in the USA - the linked Audiophonics source I believe is in France.

Before buying power cables for individual equipment consider the power cable for your power conditioner.  The power for all the equipment plugged into the power conditioner is fed through that one power cable.  This is also the first thing that your power conditioner sees and matters most, followed by the wall outlet, house wiring, the drop from the utility pole, and so on.

There is no need to spend ridiculous amounts of money on power cables.

Check the below out for example. Its current carrying capacity of 90 amps at 10 awg is a testament to its quality. And for short runs, its stray capacitance & inductance will not matter. It only costs about $2.60 per foot.

www.mcmaster.com/6276T19/

I changed my 2 channel and HT wall warts to Audioquest NRG15's, using all Audioquest powercords(various versions), with Monster HDP2500 for HT system, and Monster AVS2000/Furman 15PFI for 2 channel setup. 

In my previous system this was a night and day difference and a must to be at least listenable. The twitter was so bright and over accentuating everything that it sounded like knife sharpening. The sibilants were ear piercing. At that time I lived in a 65 year old townhouse with potentially the worst electricity ever. For example, the system was completely unlistenable between 6pm and 9:30pm. After 9:30pm you could listen to it as it sounded a bit better. Weekend mornings sounded ok too. My friend is an electrician. I asked him if he can pull a dedicated line for me to plug in the gear, we decided on 20 amps. I bough an Audioquest Edison plug and he put it on that dedicated line. Things improved in terms of dynamics but the brightness didn’t. I then bought the Niagara 5000 power conditioner and 4 Monsoon and 4 Cardas Cygnus power cords. Some components liked the Cardas better, some the Audioquest but the main difference was that all the brightness and over accentuating went away. It literally disappeared and the tweeter became very relaxed and natural sounding. This literally was a night and day difference for my system. Your mileage can very however as these things are system dependent. It is better to play it safe and try before you buy.