Welcome to the forums @Koraha.
If you fancy it, introduce yourself here: Introduce Yourself! Nice question, sure it’s the right place. It’s bass related! Well then…
Bass is a low sound, so mid speaker will only help partly. If you want to overall boost the basstone in car audio, let’s start first with remembering, that every recording is different. So one recording could sound on the same (car)audio as a good bass, when another will give you on a different sound. And that depends on several different sources: the recording itself, is it on air, is it on cd is it on mp3, is it on a phone in for example acc format, what kind of car audio do you have, how spacy is you car, what’s the sound dampening of your car interieur, to name just a few.
Knowing all those questions, first use a decent recording: meaning don’t plugin you phone as audio source, use cd or a full mp3 player. Might even use tape if you want to. Phone recordings (for example using itunes and iphones, but it’s the same on androide) are extra compressed, so only if you sure it’s an mp3 being played then you have a full range of the source sound.
(As info: on the phone most compression is done to save space, it’s done by, in part, removing the low sound range, yes where bass sounds are. As most folks listen through small plugin headphone which aren’t able to deliver a deep bass sound. Yet because those are inears, most people believe they still hear all the bass. It’s a lot of fun to let people experience the differences between headphone, hifi audio sets and studiorecordong listened to in the recordingstudio itself. It’s very different, even without) in general if you a good recording format like mp3 you will have more bass available to listen go.
Second, any (car) audio can be improved by using a equaliser that way you can boost the low and mid range giving you more bass sound to enjoy.
If you have done that, then add a subwoofer: those are meant to play the low range in a recording. (Read, the play the bass tones the best from your speakers) you experience the bass sounds easier. (So yes you could argue that the space in a car isn’t the best place to play bass loud as most carparts will start to resonate. But your asking not for loudness, you ask for a more clear bass sound)
What might seam a different approach is to look at something like https://bassprogo.com/products/jbl-basspro-go?variant=38176210682054
It has basicly all the above meant features allready built in. So connecting this to your caraudio system will give a low range sound boost or to say it in general: let you experience the bass in a good bass-included recording better.
Hopes this helps, if you want more indept answering of any part, just ask. I’ll do my best to explain it in a readible and simple form.