Ok, maybe I couldn't tell the different colours of the curves apart to know which one is which. So to be clear, at lower volumes it increases the level of the high and low frequencies, and at higher volumes it "flattens" out the frequency response? And of course, what happens when you're driving and you start to get the contribution of road and engine noise to the mix? Does it simply increase or decrease the overall level, or does it do some kind of frequency shaping as well? I guess I need to figure out a way to drive and handle my Smaart rig at the same time!! Shh, don't tell anyone!