Nearly all manufacturers do not advertise/exhibit their product measurements? Why?

This is an excellent study of analog interconnects used in audio. First, note its from a peer reviewed journal, Journal of Electronics and Communication Engineering. Next, note that the author IS a scientist and has received many awards such as CASE and Carnegie US Professor of the Year. Finally, note the extensive (45) references that are listed in the bibliography. The author doesn’t post a video of himself to try and promote his own study.

The fact that this paper proves the videos and research you often see (in this thread from newer guest members) are inaccurate and incomplete is fine. You do what you can with what you got, but please don’t be so irksome about it. Please enjoy this third party, peer reviewed research from an actual award winning, highly respected scientist

An electrical study of single-ended analog interconnect cables

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The "Pepsi Challenge" , here is another internet reviewer that wanted "proof" about cables and his own story. I think some of our newer visitors/members have been invited to Danny's as well:

Another video, wear your headphones, even through you tube you can tell the difference the ADD POWR conditioner makes in this quick A/B comparison at an audio show. Ask members of this forum who own the brand if they like it, be skeptical, get a trial version, blind fold your friends, give prizes for who can hear a difference. Many of the ADD POWR products are easy to "blind test" if you are so inclined. You just plug them into an available outlet in your room (it isn’t necessarily a power strip depending on which product you try) so a friend can plug and unplug the product in an available outlet while you close your eyes and listen and count how many times you can tell a change. Then change places with your friend. Is it "scientific research" No. Will it help you decide if you should return it? Up to you to decide:

Those people could train evangelicals.
Someone could get a Nobel prose if they could measure this stuff. 

@holmz  I can see you have a bag of problems trying to maximize the quality of your listening room.   Your walls are superior to typical drywall.  You have to work within your older home (some of my rental homes date back to 1914 and the 1940s, plaster walls).  I remember my 1886 group of 4 homes which also had horsehair and plaster walls, full measurement redwood beams and studs.  The 1971 earthquake got them, they probably sounded good for audio. 

In my prior home, I built it with 5/8" soundboard used for studios separated by insulation and then 5/8" X drywall (no one's going to punch a hole through).  It was on 6" 3000 psi steel reinforced slab with 2 X 8 walls, staggered 2 X 6 studs every 8" and 2' concrete footings-still very inferior to my current room.  If found florescent lighting to be much noisier than LED but incandescent in California is still available. 

I have my voice lessons by zoom in my new listening room.  Vice versa, if it's great for music it is probably great for speech/singing.  Green glue reportedly doesn't do much but sealing all joints with spray flexseal worked for me. 

I recommend Synergistic Research power outlets, including their earliest ones which can be had cheaply but I see that they don't match your Australian cabling plugs.  Second best would be hospital grade outlets which I used for 25 years in my prior home.  I installed $50 h.g. outlets in 1993 but the problem was corrosion even in the dry climate I lived in.   

I wish you good luck in putting together your video/audio room with the constraints you have.  It can be daunting (my "slightly" autistic best friend moved 5 years ago after 30+ years on a slab house to a mobile home-oh boy, he has vibration/acoustic  problems).