Reminds me of a funny story I heard Tom Petty once tell. Apparently, he had a buddy with a POS car with a crappy stereo, and Tom insisted that all his records had to be mixed and mastered not so that they sound great on the studio's million dollar equipment but in his friend's car.
I had the same exact approach back in the late 90's. My friends had several band projects and when they were mixing their demos, I insisted that if the mixes sound good in a standard car stereo, they'll sound good anywhere.
Getting the music you made in your own DAW to sound good on your home speakers is almost easy. getting it to not suck on shitty speakers? that's an art.