johnjen
Headphoneus Supremus
I agree that for a 'steady state' musical source, the organ and standup basses, can generate as low as 32Hz primary notes, but it's the harmonics not the primary notes that come alive when the system is capable of reaching down below 20Hz.At the bottom of this page there is information on how to reverse polarity in JRiver https://wiki.jriver.com/index.php/Parametric_Equalizer
I guess you have to tweak the interface GUI to have special column for it (and fill it manually)
As to 15 Hz and even 12 Hz I have posted this graph before. Music? Organ only (if any). Can it produce 80+ dB at that frequency? Probably not. YMMV
https://www.acousticfields.com/wavelengths-in-our-rooms/
And those harmonics are at a lower SPL which means when they can be heard/felt, they add an extra dimension to the soundfield and the entire acoustic space.
Also I tend to use the Fletcher Munson curves to my advantage as well.
And by elevating the overall playback volume a bit the extreme bottom end gets an 'extra boost'.
And no I don't crank on the MOAR knob till my ears bleed, but when appropriate I will hit the mid to upper 90dB's which puts the peaks in ≈100dB+ range.
And tube amps, at least the ones I have, REALLY like to get cranked up just a bit.
But it's impulse sources as mentioned (percussive instruments/sound sources) where being able to 'properly' reproduce those frequencies at the very bottom of the FR spectrum, is where the benefits really stand out.
And as I mentioned there are other ancillary sonic and acoustic benefits that come alive when the entire system is able to reach well below 20Hz, besides being able to hear/feel that portion of the audio spectrum.
And these benefits reach all the way up the spectrum, as strange as that may sound.
JJ
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