To be able to pull this off I needed two important components the Dolby Digital Encoder to take all music and convert it to Dolby Digital in realtime.
Enter NVIDIA Soundstorm
NVIDIA's Soundstorm webpage
The motherboard I selected was the ASUS A7N8X Deluxe which has the NFORCE chipset with the integrated Sounstorm ALU. The output from the motherboard is a digital spdif connection. I wanted to not use the analog connection as I would not be using the digital abilities at that time.
Now the next step was find a way to decode the Dolby Digital signal. I had a few choices I could use an amplifier from a home theater solution but wanted more of the car audio way of life. Thats when I found the Creative's Sound Blaster Extigy. It has the ability to decode Dolby Digital signals and actually had both optical and SPDIF digital inputs. Perfect! If that couldn't be enough of a reason to go this route...12 volt DC input which means I could run it off my computer's power supply. More on that later.
I finished the set off with a trio of Rockford Fosgate amps and three sets of speakers and two subs
As you can see from the drawing the speakers near the passenger and driver actually emulate the center channel instead of the front left and right speakers because the majority of the sound comes from the center channel not the left and right front speakers.