dude, Bro, MY MAN.......those were GREAT video's. Thanks so much for taking the time to make them and post them up. Everything you said makes sense. In the end, if you have a line driver, chances are, your amps gains will be all the way down or barely up. That is because the gain is then properly matched to whatever is in front of it. In this case, the amp being fed PLENTY of input voltage. No need for extra gain and the dd-1 proved that. And like i been stressing, that is the gains one and only purpose. To be matched to its source's output. I don't know why people, especially people that should know better, are so hard headed and try to argue with me .
But for the Ear-o-tuners, i will say this. Once you find your maximum non distorted output, and all gains are matched, it never hurts to turn them DOWN a little.......while tuning by ear, if you need to. Heck, thats why there is overlap tracks included . There's obviously more to tuning then just the DD-1. The ears will come into play for SURE. But, i will argue til i am blue in the face......a DD-1 OR an O-scope should always be your first step. Ear-o-tune away once you know you are safe!