Do we "need" those <20Hz subsonic frequencies for high-fidelity audio? 2017-05-14 01:57:53 I'm looking at subwoofers these days. Many of the 'high end' subs are rated (on paper) to go down to levels like 10 Hz at 126dB.When playing music that was recorded live, like jazz in a church does a sub that goes down that low give any benefit at all since we can't hear it? I've read that the room acoustics of a recording can be recreated with subsonic subwoofers, but is that true?Even if it helps on movies (does it?) what does it do for well recorded music?Thanks.