What is the most important cable?

Mine is the most important cable.

I hardly care at all about yours.

(speaker cable)

i noticed the biggest difference between cd-preamp....i think.......wait.......im not sure i can tell the difference between anything anymore.

IC's - Source to pre-amp. If you don't get all of the info right from the start, you won't have it at the end.

Power Cable - Amp, like someone else said, it draws the most power and amplifies the most noise.

This is exactly what I experienced in my system.

the one from the brain to the ear canal

The first one in the signal path..