The output of the sound car which is build in to the motherboard is 1 V which is standart. The signal that amplifier takes in is 5-8V . This seems to be the problem. There might be 2 solutions:

1. get a head unit with auxhilary inputs . I would get it but iut's pricy and there is no place to put it since the upper din is blocked by the monitor and the lower is taken up by the equalizer.

2. someonw from the mp3car.com forum had suggested that I use this to boost my signal::
http://cgi.ebay.com/ws/eBayISAPI.dll...ory=14931&rd=1

luckaly it is for sale on ebay and the guy is in Boston! I am trying to arrange delivery. I willn try this it is promnising. I am all tired of this project for now. Frustrated at this point. Really wanna get it over with. No stereo or video or anything working in my truck right now. Got wires running everywhere. What a mess. Hope it will be worth it in the end.

I would appreciate any input.