Gain level on a REL sub

Another thing, you want that high-level cable cut as short as possible once you finalize your sub placement. It makes a difference. 

I had this same issue with my Carbon Special. I could not get the high level connection working with the Ayre amplifier I was using. It turned out the problem was that I had the ground cable connected to one of the Ayre’s chassis screws (the foolproof way to connect high-level to a balanced amp according to REL). When I finally tried floating the ground cable (ie connected to nothing), the problem went away and now the sub kicks like a mule on steroids. 
 

Perhaps oddly, I didn’t have that problem with my Yamaha 2100 integrated when connecting the REL’s black lead to the Yamaha’s phono ground. It’s also a fully balanced amp, so not sure what the difference was. 

what exactly do you mean by it us the wiring? Are you referring to the quality kf the cable or how it is wired. I have followed the recommendations that REL suggested.  

How it’s wired. Try disconnecting the black ground cable from your amp. 

Please go to their site (REL).
 

Unfortunately their connection recommendations do not work for any and every amplifier. Sometimes the ground need be floated/disconnected. That’s just the facts.