audio mazda 3 question?

[ghettobubba2001]

hey guys do i need an aftermarket headunit to connect subs to this ride? i got a mazda 3 2008, and i have a box and an amp to throw in the trunk but dont know what i need to wire it.... and or are there audio ins on the back of the stock headunit?

 

[marine66]

Amp and sub

No, you can keep your HU. I got a 10" sub and amp and ran it from the line that would have ran into the factory sub.