What About Loom Theory?

I think you misread it. It's not loom, but looney theory. It's basic premise is that if you do it once, do it multiple times in order to achieve greater synergy. It only applies to cables. For instance, if you have a power cable, then have your interconnects and and your speaker cables by the same manufacturer. I strongly caution you that this theory doesn't apply to any other components but cables. For instance, there's far more synergy to be gained by mixing and matching preamps to different manufacturers' power amps. Also, never have the same brand loudspeakers as you do power amps. It really is looney.

Zero response from Google on "loom theory" so I have no clue.
Though I doubt it is looney theory. LOL
Maybe some new fantasy from the same folks who added Quantum ti the cable vocabulary.
In other words just 'spin' to boggle your mind.

Assuming you are referring to use of cables and power cords from a single manufacturer, as Onhwy61 inferred, see this thread. The thread initially focused just on power cords, but eventually broadened in scope to address all cables.

As is usual in audio, there was no consensus.

Regards,
-- Al

"Loon Theory," yes. Self explanatory...