What is the most important component in your system.

To me it is my ARC Ref 6 preamp. I have used a few other preamps, ML38s , ARC Ref 5se,  with my current system and none has taking me closer to music then my ARC Ref 6 preamp. Years ago I always thought it was my B&W 800 Matrix speakers and then my Krell FBB amp. But found out that to get the best sound from my 800s it is a preamp..Years ago i never knew how important a good preamp was in reproducing music. And sure everything adds up ,like interconnects , power cables , speaker cables, platforms and all those tweaks that we use and try. Now i not saying that i was never happy with my 800s and Krell or even my ML 38s. But adding my current preamp really makes my other components bring out their best.