I came across this and it’s nothing new we haven’t already read here:
In this part of the series we'll look at the frequency range of the bass and where it fits in with many other popular instruments.
www.studybass.com
Also checked out some other bassist forums. Some of them even say that below a certain frequency tends to cut out at mastering time.
Probably better to look for evidence in recordings. Maybe that Telarc 1812 Overture has some in it. It was after all designed to give the audiophile a har…. You know what I mean.
If you don’t intend to watch movies or listen to special effects probably you are safe to keep it flat to 25Hz to be safe. Then there is electronica. Hard to say how much they really put in there.
Modulation happens but it’s really hard to say if it comes out at levels which are discernible. Might have to experiment with an actual bass and spectrum analyzer I guess.