I am new to this, i used to have a 97 honda civic with this same setup in it, but i had an aftermarket radio so i did not have to have a line out converter. i will be using the stock radio.i was wondering how the best way and place to connect it. by the way its 2 lanzar 12's and a pyle acustics 1900 watt amp. this is in a 2007 mazda 3 sedan