Head unit and speaker selection

GSpeed
GSpeed Posts: 20
Hello!
I'd like to upgrade my OEM (2002 Galant) head unit and speakers. The existing size speakers, head unit are as follows;

-Head unit is DIN size
-Front speaker location and size: lower front door panel, 6.5"
-Rear speaker location and size: rear deck, 6x9

I would like to use the existing speaker locations without external amp. What information is needed so components complement one another. Do the aftermarket speakers and head unit have to match my OEM head unit and speakers (ohns,watts etc.) due to existing wiring? If not, how do I select aftermarket head unit and speakers?

For example, I've been researching a head unit I like with the following specs;
-Maximum power output 212 watts (53W
Post edited by GSpeed on

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