Help with standard system plus 2 subs

[2005vzute]

g'day all,

was just wondering if someone could help me out on a vt executive..the sound system is standard and going to attempt to hook up 2 subs, we have all the gear to do it, i haven't had a great deal to do with subs just yet so abit unsure how to connect it all up...

just a few questions, to hook it up to the headunit, do we use our line converter wires to run in parrallel with the door speakers? so 2 wires on the right door speaker, 2 wires on the left? then it's converted to rca cable..how do we go about wiring up the subs to the amp, i've read alot about bridging and 4 ohm etc, the sub box has 2 lots of rcas, so 4 connections all up...are we meant to do this is series or in parrallel or what?

if someone could draw up even just a dodgy wiring diagram for me i'd greatly appreciate it

cheers everyone

[Nic92]

it depends on the ohms of the subs and what amp you hooking up 2 it