thats the thing. i cant think of any specific situation that falls in line with even halfway modern car audio that this would be a simple way to tune. You seem to indicate that its not for people looking to squeeze every bit out of their system, but when i think about it, the guys you are referring too dont really have the trained ears to pull off a "by ear" tune. I just think this thread needs a little note at the bottom that says "for systems that are from before the year 2000 and without access to new technology."... learning how to listen for stuff and tune by ear takes a very long time. your average joe will have a much quicker time using a basic rta app and adjusting levels and doing wide eq cuts that will end up with a much better outcome that takes maybe an hour or so as opposed to weeks like this guide suggests. Idk, call my cynical but i dont think this guide