

Advice for making something like this? Headphone extender + instrument cable combo, for bass and IEM via 1 cable.
Would I run into interference / crosstalk issues if I used star quad mic cable? One pair running stereo signal at headphone amp levels, and one pair carrying unbalanced instrument level signal. It would only be for 12-15 feet. I can think of half a million reasons why it's technically slightly sub-optimal, but how bad would it actually be in a live environment?
The other option is 4 pair snake cable, which would be individually shielded. (Only using 2 pairs)
Edit: to clarify, I own the Ernie Ball cable shown. I want to replace it with something lighter, since it's very heavy and slightly annoying to coil. A loom would be a downgrade IMO.