Hi Sifu. Good day to all of you. I would like to do some upgrading of speakers to my car which is now using the factory setup. Nissan Almera Turbo. I do not wish to spend much, hence I just wish to do some simple upgrade.
The car come with 4 units of speakers, 2 front & 2 rear. May I know whether I can replace the 4 units to:

A) 3 way coaxial for the front & 2 way coaxial at the rear

2) 2 way coaxial for front & rear

3) 2 way coaxial for the front only

Which one is more recommended ? I do not wish to spend on component set. Thank you everyone

Better if you don't upgrade n live with it. If you do, you'll end up spend more upgrading or trying to fix those endless issues..

Coax at rear (2 or 3 way)

component on front.