6 speakers hooked up to a stereo amp(stereo means 2 channels of audio), isn't surround sound! Surround sound means 6 seperate channels of audio seperated for a video picture. The subwoofer handles the base, the center speaker handles mostly speach, and the last 4 handle 3d sound effects. But even in surround sound the music for a movie is usually only in the front 2 speakers, so mixing music with anything but 2 speakers is ridiculis. And a car system is not in surround sound no matter how many speakers it has, because CD audio is only in stereo. Funny story- Mike D from the Beastie Boys once told me of a story about how the studio they recorded Paul's Boutiqe in's power went out so they had to mix the rest in the producers car! It sounded great but when it hit the shelves alot of fans started to notice that it only sounded good in the car. Every other stereo sytem they played it in sounded like crap. Of course now days that CD sounds fine because they've remixed the current release, but the lesson they learned is simple-If you mix your music on a system like a car, thats made to sound great for listening to released and mastered cd's, then it'll only sound good on that system. But if you mix on a stereo pair of monitors(speakers), made for mixing then it'll sound great on every system, headphones, boombox, home stereo or your car. And cars only have more than 2 speakers so the people in the back can hear the music just as clearly as in the front, but each pair is the same two channels duplicated. I'm not trying to diss your producing method man, I'm just trying to help. If you go into any proffesional studio in the world, they'll be using 2 speakers(monitors) to mix, unless they're mixing sound for a DVD! But if your mixing your music for CD,Tape, or MP3, then you should use 2 speakers to mix, thats just a fact, I didn't come up with it, I learned it along the way.