I have run 25hz through my BF super twelve for about 6 hours total and it has definitely loosened up, the hum/pulse has got steadily more bassy and is more a throb now, the missus thought it was a Chinook helicopter in the distance when she was upstairs, it has actually given me a headache !!
I have also turned the volume down as it was getting slightly louder .
I have also turned the volume down as it was getting slightly louder .
