Issues with unbalanced mono (ts) over ethernet

by Matt
(Minnesota, United States)

Here's the deal, I've finally settled on a recording studio setup. I made an XLR snake using ethernet cable. Eight XLR over 3 ethernet cables. Connections as follows:


XLR 1 hot - ethernet 1 green
XLR 1 cold - ethernet 1 green/white
XLR 1 ground - ethernet 3 green

XLR 2 hot - ethernet 1 orange
XLR 2 cold - ethernet 1 orange/white
XLR 2 ground - ethernet 3 green/white

XLR 3 hot - ethernet 1 blue
XLR 3 cold - ethernet 1 blue/white
XLR 3 ground - ethernet 3 orange

XLR 4 hot - ethernet 1 brown
XLR 4 cold - ethernet 1 brown/white
XLR 4 ground - ethernet 4 orange/white

XLR 5 hot - ethernet 2 green
XLR 5 cold - ethernet 2 green/white
XLR 5 ground - ethernet 3 blue

XLR 6 hot - ethernet 2 orange
XLR 6 cold - ethernet 2 orange/white
XLR 6 ground - ethernet 3 blue/white

XLR 7 hot - ethernet 2 blue
XLR 7 cold - ethernet 2 blue/white
XLR 7 ground - ethernet 3 brown

XLR 8 hot - ethernet 2 brown
XLR 8 cold - ethernet 2 brown/white
XLR 8 ground - ethernet 3 brown/white

The snake is about 20' long and connects up to drum mics. I've tested this thoroughly and don't get any interference from outside sources or from the feeds of other mics in the snake. Seems the twist rates of the pairs, coupled with having the ground wires of all of them being in a different ethernet line helps, despite that all 3 ethernet cables are zip tied and run together.

I am attempting to do the same thing with the aux sends from my mixer that go to my recording interface. For this I used 1 ethernet cable to cover 4 aux sends (mono running over ts plug onto twisted pair). Checked all the connections - everything lines up as it should and there is no shorting (used multimeter to check continuity of all endpoints on one end to all endpoints on the other end). One would think I would get success right?

Tried the 4 different aux sends with any combination of the 4 mic inputs - I get varying levels of the signal (due to the levels set on the mixer) across all 4 inputs of the recording interface.

I'm in 4 active bands currently, and have done temporary and permanent sounds installations in many situations. I work with hifi electronics (installing and as a technician) for a living and, under the guide of a PLT licensed installer, have used ethernet to run long distances of stereo audio from composite jacks (RCA plugs) numerous times, but have never had this issue at all. In those cases we weren't using ethernet with shielding so I know those situations working has nothing to do with that. Can anyone provide me with some thoughts on why I'm getting cross-talk on these lines?

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