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Why use ground wire from preamp to amp???

I am buying new cables from amplifier surgery guys in downers grove, IL.  

The cables are nice looking, shielded, silver solder, cardas connectors silver plated, all silver solder used, silver tinned strands,Yatta  Yatta  Yatta, ok whatever,  


Their reference rca's come with the third ground wire? They said hook it to the preamp ground?

 This is not for phono connection, why would anyone hook a ground wire to preamp when not using the turntable?  I have never heard of this before, would this be dangerous, if some current or noise is sent down the ground wire directly into the cables at the input of the amp??  

Why even have them?? What is the purpose, or have I been out of the game too long?

shouldnt I just order regular reference rca's without that silly third ground wire which serves no purpose unless hooked up to a turntable???

HELP ME UNDERSTAND, PLEASE



arcticdeth

Showing 3 responses by arcticdeth

arcticdeth's avatar
arcticdeth OP
1,572 posts
 
Would any current, or dc pass through, or anything that could cause damage to the amp or preamp, cables?  

 So if I use a turntable, I remove the cable ground?

strange, very strange,,,, 



arcticdeth's avatar
arcticdeth OP
1,572 posts
 
Huh.   Thank you. 
arcticdeth's avatar
arcticdeth OP
1,572 posts
 
Thats just it.  I have several pairs of good rca's , none come with this ground wire.  It is strange. Unless for phonograph

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