The best equalizer setting for your car is one that is neutral. A neutral setting is best for most genres of music and podcasts. However, if you prefer bass-heavy music like hip-hop or EDM, you could boost the mids and highs by +2 or +4 and boost the bass by +4.
What is the best EQ setting for bass?
Bass exists between about 20Hz and 200Hz.
Every musical note corresponds with a frequency. If you want to maximize your bass-heavy music, you need to adjust your equalizer within the 20-200Hz range by boosting the decibels (dB) in that range.