I did try adding a 2nd sub and plugging the XLR into the card OA18 #2 1/2 just to try something different. Have tried on OA18#1 4 by itself etc.

I took the cards out over the weekend to check the jumpers which were correct and made sure they are seated correctly etc.

One thing though... The XLR cables I bought are sealed etc but if they did or didn't use the 3rd pin would this be some cause of the drama?

Thanks




Theatre Room: Sony 4K VW500ES, 861v8+ID41, HD621, DSP6000's, DSP5000C, DSP5000's, Oppo 205, Sat STB, XBox One X, Stewart Cinemascope Screen, QNAP TVS 1271U-RP (96TB) with Sooloos/Roon core pkg.