I played around with the filters and came up with this (with the wires pulled from the mains):
I added a 6th filter for the low end. It sounds pretty good. Not sure about the trough at 132Hz. I'll at some point do a Hz by Hz measurement with the Rat Shack meter to see if I pick it up with the mains attached, but I don't feel like doing it now. I think I'll watch a movie instead
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