REL high Level + Class D amp help pls !

I was curious if you watched this video?

hey yes ive watched .. but ive read many things and claims that this doesnt solve the problem.  and i want to make sure im not dmging my gear becuse they are not cheap ^^ thank you 

Why not follow REL’s instructions and see if you have a problem? If questions, contact REL and Purifi.

It works. I have mine connected that exact way. My integrated is fully balanced design so negative from REL cannot be connected to negative speaker terminal on the amp. This lack of grounding on REL results in hum. To fix it, I simply connect a modified (center pin removed) RCA (single) between REL sub/in and an unused RCA/in on the amp. Problem solved.

wait i put it into RCA in the external amp?  or RCA in the preamp (in my case the avr)? ty 

helps to learn directly from the amp manufacturer whether the speaker negative terminals provide a true ground.... not all class d amps are the same, just like not all class ab amps are the same in terms of their design, and treatment of the ground plane

@noiwk1991 preamp RCA input.

I just purchased a REL sub and connected it to my Rogue Sphinx Class D with high level connection as recommended by REL. I float the ground wire , but I did wrap the end with electrical tape. It worked perfectly, no hum and very easy to integrate with main speakers. Good luck!

I would think you could just connect the ground wire to the amp chassis and avoid fiddling with a second cable.

I have two REL S510s connected to individual mono block class D amps.  Just take the black wire and secure it to the outside of any RCA connection.  There is no need to put an RCA connector on the black wire, just secure it somehow - bubble gum, electrical tape - anything that will keep it connected.  I have a large spade connector on one and if fits nicely around the outside of the RCA connection.  The other is bare wire and I secured it via a RCA 'cover' which is usually used to keep the dust out of unused RCA connections.  Anything will do as it just needs to remain in contact.  On my system, leaving the black un-connected did create a hum.  Since I use balanced the XLR connections on the back of the amp, the RCA jacks were unused.   The black wires can also be connected to any unused RCA connection on any other piece of equipment in the rack as well.

You have 3 subs. Connect one to each of your front speaker terminals. You probably only need to connect the red and black wires or you’ll get too much bass. Tape up the yellow wire. For the third, put it in the back and connect it to the amp using the method rtlover describes.

question guys.  !!   

if i use Y splitter on the Pre Center RCA (where i connect the exteral amp)  and then connect 1 RCA to the amp for the center amping.  and second RCA to the subwoofer Low Level Imput  will it work?  will the sub then get the signal like the center but through the low level?   thank you !