Digital Shorting Plugs

Anyone who tried these share your experiences?
I imagine they improve performance of lower cost equipment, but do they work on more expensive digital equipment?
Since we have moderately high end digital sources, I was wondering how well these work.
Consult your owner’s manual to determine if the manufacture recommends shorting plugs. Some equipment requires XLR shorting plugs when using rca outputs, other do not.

Some people use XLR and RCA caps without shorting pins (Cardas Caps) which are purported to stop stray RFI/EMI from entering the equipment.
These plugs make no difference whatsoever. There is no technical reason why they should. Inputs do not radiate, so no reason to put caps on them. If they pick-up stray noise, then it is a bad design.

The only REAL plug that is effective would be for a coax or AES/EBU output. This would be a 75 ohm or 110 ohm terminator plug. This will terminate the output and prevent spurious emissions. Even the value of this is questionable. Waste of money IMO.

Steve N.
Empirical Audio
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This is good info here, thankyou to all, I enjoy reading something that I do not know of.