I bought the sub about 6 months ago on craigslist and I didn't notice this being an issue then. Over the past 2 or 3 months, the pops have been getting more and more frequent.
Basically, I can only really hear it when the room is quiet but it is very annoying during a quiet part of a movie. The popping doesn't stop even after disconnecting the RCA inputs, it only stops when turning the sub off completely.
I have seen a lot of posts by people hearing loud pops, but these are not loud and seem to have no correlation between switching inputs or powering on/off the receiver. The pops are completely sporadic much like popping popcorn. Turning up and down the volume doesn't change anything about the popping.
I have also switched the sub to Always On instead of Auto with no change.
Does anyone know how I can start narrowing down what this might be? I looked at the amp but didn't see anything abnormal but I'm not sure exactly what to look for either.
Any help is appreciated. Thanks.