Wasn't sure if this should be in the Amplifier section or not but since this is a general type question I thought I would post here. What does it mean to "Drive" an amplifier? I've seen YouTube videos where they say they are driving the amp with, I dunno, 30 watts, or 65 watts, or 100 watts. What does that mean and how is it done? And how do I do that on my Yaesu FT-950?