RCA and XLR shorting plugs??

As Dgaylin mentioned, Cardas does make real shorting caps and they do work. I was getting some cross talk from my VTL pre and put the shorting caps in my unused inputs & that solved the problem

The caps you usually see simply keep the jacks clean & they come in both RCA & XLR, as well as other configurations.

If you google "rca shorting caps" you'll find a lot of info, including DIY on the cheap. The only thing I would say is to make sure the manuf. says that it's ok to use on your gear.

Here are some cheap ones.LINK>>>[http://www.mcmelectronics.com/product/27-5335]

I use these analog terminators on my RCA jacks and the digital terminatiors on unused s/pdif jacks on my CD player. My wife gave them to me as a Christmas present. Was there a huge difference? No, but I though I could hear a small change for the better. They are not expensive, and are very well made for the price.

By the way, NEVER put them on an unused output jack, or you will kill the amp/preamp/player.

http://www.highend-electronics.com/20.html