Car Stereos: how to fix sub, new ford fiesta, ford fiesta in india

Question
I have bought a new ford fiesta (in india) and it comes with a defualt kenwood system, it has only front and rear out put, now i need to connect a sub woofer to the system.

i have a 4 channel Sony amp  and a 2 channel mono block pioneer amp.

Since i don't have sub woofer out put, in the HU, and i don't want to remove the existing system.

kindly tell me how do i connect, any possibility by adding a cross over or something ???

Answer
Hi Timothy,

What you need is a low-level converter.  It is a device that you will connect to your high-level speaker outputs, and it will convert it into a low-level and remote wire you can connect to your amplifier.

Something like this is what you need:

http://www.crutchfield.com/p_142SLC4/Scosche-SLC4.html?search=level+converter&ss...

Justin