There is no difference in anything in set-up. My speakers are dead flat from 100hz to 14KHz +/-1 db. The matching is in impedance on everything in audio. Capacitance and inductance play some role, but that is more of an issue with speaker cable than IC's.

If you guys want to experiment try it yourself, you will see. Impedance is the same reason a tube amp sounds the way it does. A tube amp will put a bump at the xover points on your speakers due to it's impedance interaction with the speakers. On a typical two way you are crossing over around 2KHz to 3KHz, so that area gets emphasized. the bass also gets emphasized due the high impedance at the Fs of the driver. The output impedance is usually expressed as damping factor (8/output impedance). What happens is when the output impedance is not low enough to "drive" the component it is hooked up to, you get some frequency irregularities at the high impedance peaks. Sometimes this is because of back EMF. Remeber as your system plays impedance changes.

Trust me you want a very low output impedance, and high input impedance...physics do not lie! One component is driving the other, you want the low impedance component driving the high impedance component.

Tim