I've had my F12 for about a month now, and have been very pleased with my purchase. This was the first subwoofer I had purchased that was not a part of a speaker package. My first subwoofer was with an old panasonic HTIB from around 2004 or so. Then a few years back I purchased the MLT-1 system which came with a sub (great system BTW, still using the satellite speakers), but it was an 8-inch sub and had difficulty hitting those lower notes that are essential for a better home theater experience. All I can say is that the BIC is a big step up from what I had before.
Just as a FYI, I am not using any subwoofer calibration for my F12, nor does my receiver apply filters to the subwoofer (rocking an older Onkyo TX-SR605 which only has Audyssey 2EQ
). Without adjustments or equalizers, I find that this sub packs plenty of punch and wall rattling without turning the volume knob past 4.