There are times when your mix sounds great in the studio but when you listen to it on your earbuds or in your car, most of the mix is gone because there’s no bass. To avoid this from happening, all you have to do is adjust the mix using small speakers.
No matter how small your speaker system is, you need to find the right harmonic multiples so that the bass cuts through. If the bass is too thick on your studio monitors and yet it fades on your small speakers, you probably have to tweak the harmonic enhancements with your EQ.
Read more about this here: https://www.audio-issues.com/music-mixing/how-to-make-your-mix-sound-great-on-small-speakers/