So your ears are reliable to 11hz, eh? Physics tends to disagree with you. You being a KEF fan I understand somewhat, tho :) Sunfire was surpassed long ago. Thanks for an awesome analysis of my hearing. At my dealer's place we played pipe organ music that has documented tones to 14hz. I can't even hear that, but I can feel it and it was incredibly butt-shakingly good. Sure, physics have a role...go audition one.