I installed an avic d3 and my factory sub doesnt work leaving the remaining speakers sounding not so hot. i used the metra rca for the door speakers, but how do i connect the factory sub. Do i need to connect a seperate amp and sub. I have a 2003 sedan, any help would be appreciated.

 

Thats odd, i installed my Avic D2 with Metra 70-7551 and the factory sub and all the speakers work good with the factory sub it hits pretty good now.

 

I dont know what i diid wrong, ive checked the connections.The metra kit only comes with 2 pairs of rca so how is the sub suppose to work off of that. Maybe im just missing something. Any suggestions?

 

Any ideas as to what i might have missed.