The Shokz OpenFit’s sound profile is pretty balanced, given their design. Since they don’t enter your ear canal, they can’t reproduce nearly the same amount of thumpy bass you get from in-ears like the Beats Powerbeats Pro Truly Wireless. They still have warmth to their sound, so they’re not completely without bass, and vocals and instruments are natural and clear in mixes. Their companion app offers a graphic EQ and presets if you prefer a different sound. However, these settings won’t get you much more of an extended low-bass as the headphones already struggle to deliver bass due to their design. The lowest EQ band you can tweak is 64 Hz too. Adjusting this frequency band can add more punch to mixes, but it won’t add more thump and rumble.
Generally, we perceive more bass and treble at high volumes than at low volumes, even though the frequency response itself doesn’t change. To compensate for this difference, these headphones have dynamic range control, automatically adjusting their base and treble based on the volume. This ensures that your audio sounds the same, no matter the volume.