What commerical audio system tweaks provide sound quality improvement??


If you look in any audio catalogue, whether Music Direct or Audio Advisor, there are usually several pages of  system tweaks.

What  tweaks in your opinion, work and actually provide real audible improvement??

Thank you , SJ

sunnyjim
perfectpathtech wrote,

"Buy a bag of child proof outlet plugs roughly $5 for a big bag. Plug every unused outlet opening through out the house, not just your sound room. This prevents EMI, RFI from entering the electrical system, the reduction in back round noise is anything but subtle."

The last time I checked RFI/EMI can pass quite freely through plastic and glass, which is actually why your cell phone works inside your house. I guess this is probably the placebo effect that’s anything but subtle in this case.

perfectpathtech wrote,

"One more cheap but highly effective tweak suspend all cabling with fish line from the ceiling, most effective in minimizing cable vibration, cable risers do not even come close in performance!"

Gosh, has someone actually been paying attention to my posts? Heavens to Murgatroyd!
A bunch of fish lines hanging from the ceiling? I think I'll stick with risers. 
@geoffkait  "I never turned off the power prior to cleaning outlets and am fine. I mean except for a slight twitch."

Bad advice, Geoff, in my opinion.

Perhaps you know enough to do that kind of thing with some safety, but not everyone does. I suggest you withdraw that.
I dislike the idea of editing to prevent people from hurting themselves. Geoff did say not to clean hot and neutral at the same time. Which is fair warning. 

But if a bunch of us say it's foolproof safety to turn off the circuit, which it is, then anyone reading this can decide how to proceed.

@geoffkait I was thinking of the pebbles with the 'special crystal structure' that you tape or place on cables and components. It's a bag of rocks from a roadside attraction anywhere in the southwest...
Actually you would have to touch both Hot and Neutral at the same time with a CONDUCTOR. That would be pretty stupid, no? Audiophiles aren’t that stupid, are they?

@geoffkait I was thinking of the pebbles with the 'special crystal structure' that you tape or place on cables and components. It's a bag of rocks from a roadside attraction anywhere in the southwest...

You were thinking? I thought I smelled something burning.