RCA shorting plugs worth it for PS Audio equipment?

[Elk]

This comes up a lot. Here is another thread:

Noise blocking caps

Powerfreq That’s an interesting response from Luxman especially given the challenge of getting the dealer who sold me my P-750u to provide me with the XLR and RCA caps. Like you, I thought that they kept out the dust and had no impact on the SQ. How are you finding your 750u? I found it to be a quantal improvement cubed on the built in headphone jack on the BHK PreAMP. Have you tried XLR balanced cables on your headphones with the 750? I have Sennheiser HD800s and the balanced cables vary bet…