Here are some of the graphs with 1/3 smoothing after I added the BFD and three filters. Let me know what you think. The peak at around 20hz I can not remove because I can not really move the sub. I set the phase on the sub to 180 in order for it to work better with the mains. As you can see my sub goes down to 9hz. What is the cheapest option to remove the hum beside the cheater plug?
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