I have the promedia 4.1 and a really cheap sound blaster 2- chanel card. I have to use a special plug thingy to plug the 2 cords into the one socket on the card. My question is, is there a real difference in sound for these speakers with 2 chanel and 4 chanel cards? I was looking into the sound blaster live that runs for about 100 dollars but is that only good for digital speakers? what do you all think?