the effects they use is mostly "distortion" and "delay".

im guessing some delay chorus and distortion?

In an underground cable, the distortion in the transmission of carrier frequency can be eliminated using inductive loading. This distortion causes a delay which will result into a variance of frequencies.Ê

Typically, it's Tuner > Distortion > Delay > Reverb > Chorus > Wah > Volume

It has to do with data communication. It is called the Shannon channel capacity theory where double the bandwidth equals double the highest data rate. This is of course theoretically and does not take into account white noise (thermal noise), impulse noise, attenuation distortion or delay distortion.