oh... so when you feel the beat, people like to dance? I've always wanted speakers with about a 3Hz cutoff, for this very reason. I'd be willing to do that exp

oh... so when you feel the beat, people like to dance? I've always wanted speakers with about a 3Hz cutoff, for this very reason. I'd be willing to do that experiment... I'd bet kids raised with headphones instead of huge speakers can't tell the difference, but I'm pretty certain I can. When you see the 15" woofer cone excursions, you rapidly learn what infrasound feels like. I bet the skill of detecting it can be learned in minutes. PS: Reminds me of the time in 1982 when we borrowed a function generator and found the resonance frequency of our floor in Sharpenberg Hall at Rose-Hulman. On of the guys had a DC coupled stereo and speakers, and I warned them to watch out for DC offset not to fry the voice coils.