Pairing Lyngdorf 2170 with REL T9x

https://rel.net/wp-content/uploads/2021/04/REL_Tx_Manual_12-20_11_WEB.pdf

I guess this is the manual?

Page 12

The Serie T/x models have three separate inputs. A high-level input socket, a .1/LFE RCA input, and a low-level RCA input. This is to facilitate use with both two-channel stereo systems and AV surround sound systems.


Page 20 for high level connections. (see pictures in manual)

Connect each sub to the speaker terminal outputs based on the following diagrams for standard stereo amp, non-balanced mono blocks or balanced differential mono blocks.

Where does it say to hook to chassis? Nothing is floating...



From the Amp manual

4.6.5 Output enable
Enables and disables HDMI audio output to the TV. This feature is only available if the digital output connector is not
in use.
When enabled, this feature will send the current digital audio signal though the HDMI cable to the TV. Disable if you
want the TDAI-2170 to send the current audio signal to the digital output connector on the back.

Hope this helps.

Regards

You hooked up a good RCA too? You tried a few different ones? Noise is usually a voltage difference, between the two components.. Completing the ground through a GOOD RCA might help.. OR running grounds via chassis to chassis..

Is everything on the same circuit? or are they on different circuits? Same 15 or 20 amp is best..

PC and ICs are routed with space between them. Not a jumble of wires??

Just asking a few quickies..

PC = Power Cables
IC = Inner connects (RCAs, XLRs and Speaker cables)

They shouldn't be all jumbled together.. put some space between them and cross at 90 with 1" of space.. Like magic for noise reduction..

Start fresh, make sure Everything is plugged in all the way. Run chassis grounds.. Clips with wires will work for a test. Ground the chassis.