I am confused about buffering, what it is ,what it does, why I may want it, why I may not want it, etc... Can some one explain it in a nutshell. Also, if my EFX loop specs are: Send:Impedance- 1K Ohm or greater. Nominal output level- -6 dbV, 0.5 V RMS Return: Impedance- 2 M Ohm. Designed input level- -6 dbV, 0.5 V RMS My EFX loop considered a high imped loop, right? As long as there are only high imped pedals in a high imped loop, then signal thru the loop remains a high imped signal, right? But if I had one low imped pedal in the loop, then the signal before the low imped pedal would be high imped, but the signal after the low imped pedal would becoame low imped and remain low impedence no matter what pedals followed that, right? I have a 2005 Gibson LP Studio with stock pickups, are those pickups high or low imped?