QUOTE (sil21jun)
Let's say it's Focal Utopia 3 way component. It come with tweeter, midrange and woofer.
Am I right to say that, tweeter has the highest frequency response then to midrange and lowest woofer? Also is woofer also known as midbass driver?
yes, sorry if i confused you. the 'woofer' or midbass driver is typically door-mounted.
i agree that it's good to avoid 'separation' issues by physically installing all drivers close to each other. otherwise you may notice treble coming from one spot and low frequencies from another; this creates a loss in imaging. but it's not always practical and may require more custom installation for a nice finish.
QUOTE
I really doubt the front door can fit another driver unless I place the speaker near my lap when the door is closed. LOL..
well, it's better to have the woofer up the front than in the door behind you, otherwise some sound will appear to come from behind. frequencies from ~100Hz upwards are 'directional', meaning your ears can locate where they originate from pretty easily (which is why subbass/below 100Hz is fine if it's from the boot cos your ears can't locate this so well).
what car is it?