Well as far as i know these low frequencies you cant hear are usually cut away from the original recording so they wouldnt stress the speakers for nothing. Or am i wrong ?
Yeah thats what i thought .. if you mean "No normal subwoofer can'T play anything under 20Hz" .. There is thing called Rotary woofer tho
edit: goddamn dyslexia.. wtf are you talking about
Really id like to know how much of psytrance or any music has these frequencies.. i know B. Lustmord has used these so called infrasounds but can normal subwoofer even play them ?