Does anyone know what I saw ?

Elizabeth's tweak sounds a little like the ground enhancers making the rounds. I think EVS has one and there are others.

After reading E's responce, I'm 99.99% sure what I saw was NOT pig tails. I did, at one time, buy some interconnects that had, at one end, the normal male RCA and a second connector plug that was like a female mini plug jack. The store owner said that was an auxilarry jack that could be used in an active grounding system.? Active grounding is for space ships that are no longer hooked to earth, he explained, but store owner's will say anything. :)

Is it possiable to do some kind of negitive feedback from speakers to the preamp outputs? Is it someway to control speaker distortion?

If I am not mistaken, an interconnect was marketed years ago that had a seperate single thin cable, terminated with a simple small spade connected to the cable's shield; one could ground or float the shield.