Hy folks,
I woluld like connect two rel sub my system. And I dont know how connect high level cable with my sonus faber. Spin Yellow and red cables and connect my positve point to sonus faber and Black cable dont connect sonus negative or connect negative? And this is same left and right side? Or what? I read many ways. Thank’s for help
Have a word with REL and or Naim.
I think you could make a connection to your hicaps (I could be wrong), but I recommend speaking to the guys at REL.
Connect the red and yellow to the speaker positive, and the black to the speaker negative. If there is too much gain, connect just red or yellow, and the black of course.
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That’s not a high level connection (connecting to HiCap line out). That’s a low level connection. When I had a single sub I tried it once and the sound quality was horrible compared to using high level connections.
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If you have a stereo pair the best way is to connect each sub to the terminals at the speakers. For each speaker twist the red and yellow together and put them on the + (red) speaker terminal. Leave the black wire hanging free, unless you need to connect it to the speaker - (black) speaker terminal to resolve a ground loop.
I have a four pack (2x2 stereo pairs) and I connect them as I just described. I have done it this way for years. It also avoids running long sub cables from the Naim amp to the subs, which are usually collated with the speakers when using a stereo pair in a music system. My sub cables are just 1.5m each and hidden out of the way.
Red and yellow are combined under the red shrink. Black stays disconnected.
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The REL website has excellent videos on connections. Two high level as above would be their recommendation.
Bruce
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For my speaker connections I bought a 3m Bassline Blue cable from REL, cut it in half and terminated the cut ends with the missing Neutrik and spade connectors I needed. That leaves me with a 1.5m pair of Bassline Blue cables, which is about the perfect length for me.
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Although it evidently works, and people seem happy with it, this always seems wrong to me. If you are only connecting one side of the signal, the reference must be made via the mains earth. If anything, leaving the black not connected might be necessary to break a ground loop.
Am I missing something important here?
Maybe you should notify REL to change their manual. 
Maybe. Can you link to the manual?
Links like that aren’t allowed. Easy enough to find if you take a minute to search.
Nevertheless, if it bothers you then connect the black lead to the negative terminal of your speaker. It won’t hurt anything. I have mine hanging free and the subs all work great.
This section then?
The standard high level hook up procedure is: attach the red wire to the amplifier’s right positive speaker
output terminal; attach the yellow wire to the amplifier’s left positive speaker output terminal; attach the
black wire to whichever of the amplifier’s ground output terminals is convenient; plug the Speakon®
connector into the Sub-Bass System’s high level input.
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That’s correct for a single sub only. Connecting a stereo pair is different. This thread is about connecting two RELs.
Also with Naim amps, it’s better to connect at the speaker, unless you get the REL Bassline Blue cable for Naim, which has logic to adapt to the output from a Naim amp. The REL website has the info about that if you look at the Accessories page for the Bassline Blue cable.
In any case, attaching the black lead or or not when connecting a stereo pair is correct either way. It just depends on whether or not you get hum. My dealer – who has installed thousands of REL subs over the years and has a REL-trained installer – told me to try it without the black lead connected, unless I need to to resolve a ground loop issue (hum).
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So ‘somebody told me’ then…
Never mind. It doesn’t really matter.
Right, a REL-trained somebody who installs and dials-in subs all the time, including singles, pairs and six-pack line-arrays. But you are probably right, I should ignore their decades of REL experience and training and listen to random dudes on the internet instead.
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No. Just the ones who have read the manual.
Somewhere they document what I said. I think in one of their Youtube videos. And often times manuals aren’t kept up to date either. The PDF manual on their website is about 5 yrs old.