Either way it seems like there's not much information in the bass (the bandwidth is narrower) and you ought to be able to EQ it better than the HF, because boosting HF exacerbates any circuit hiss.
Am I wrong? Is there LF circuit noise (rumble?) that's a problem that limits your ability to boost the bass with EQ? I would think that LF rumble is usually ambient noise, e.g. from trucks driving nearby or room mode boom, not a mic issue per ser (unless you have a bad shock mount), so it's going to have the same ratio to LF signal whether it's boosted or not. (Boosting a weak LF signal will also boost any LF noise, but won't change the ratio.)