@neonknight
..I seem to recall that long speaker wire is more preferable than long interconnect runs...
XLR interconnect cables are specifically designed for long runs. The test was to validate it so you could rectify the situation, "loss".
Would you entertain "speaker wire length advice" from the CEO of PS Audio, the guy who partnered with Bascom H. King to design and manufacture your BHK amplifier?
Video:
https://youtu.be/Xd8JYfiKp3c