Set your sub or subs properly (not by ear in my book) and forget. The sound recorded is what I'll listen to, and with three subs down to 25Hz I'll only hear what is on the program, nothing more or less. Having that clean tight ultra-low last octave adds a lot, but only when it should.
Mine are 100% sonically invisible.
If I have a recording that is just too lean, or being played too low in volume, I can use a 'loudness' type button to help add a subtle bit of low end curve. I use it for low volume listening mostly. I never touch the subs once dialed in.
If I have a recording that is just too lean, or being played too low in volume, I can use a 'loudness' type button to help add a subtle bit of low end curve. I use it for low volume listening mostly. I never touch the subs once dialed in.