I'm no expert but what I know about sound reproduction says that more drivers you have in your system, the more accurate the reproduction will be. One cannot expect a single driver, say a mid-range for example, to be able to move fast enough to generate a wave sufficient to generate higher frequencies (10-15 kHz or higher) than a dedicated tweeter would. Most manufacturers of successful systems typically have three or more (tweeter, mid, woofer) plus if you throw in a Sub, you've added a fourth. I upgraded from a two way Abstract Acoustics 2.1 set that I thought sounded very good, to the M60Ti which sounds amazing. Especially when I did A/B tests, the difference was phenominal.
