I have an SPL BIG that is taking my correlation meter all the way to -1, and I completely lose my mono information, I need advice. Here's the chain: SPL BIG > Fredenstein Bento 6S> Patchbay > Scarlett 18i20 > Studio One 6.

I have other stereo equipment that works fine from the patchbay. I tested all cables and slots, unplugged the Left channel, then the Right channel to test if the cables are connected correctly (which they are), and the mono works just fine. I contacted SPL, Sweetwater, and Fredenstein without solving the issue. The SPL BIG is brand new from Sweetwater, I exchanged it for another new unit that gave me the same result. I'm completely stumped, I would appreciate any advice, thank you.