I'm looking to connect my pin (Mandalorian Pro) to an external powered sub that only has RCA inputs, Line In Stereo or LFE. I tested this weekend using speaker terminal from the pin to single RCA to the powered sub which worked and sounded phenomenal. However, when I also connected my home theatre, I got noise from the pin sub, assume this is the result of a feedback loop. Am I doing this correctly? I know there are several threads on this topic and I've read them all, just didn't find anything specific to my situation and obviously don't want fry the board on the pin. Thanks in advance!!