I'm late but I'll threw in my 0.02 cents. This thread really went down the toilet in a hurry. Aside from being a wise ass, or sarcastic these guys are really here to help you. And they did! Trust me I've argued with these guys before, but they really are helping you.
You're asking a question that is difficult to answer. Take this lesson I learned after using a SMD CC-1 and the potentiometer you want to "turn".
When I was tuning a Crossfire amp, and my gf's daughter's bass amp, I originally set the frequency cut off to the middle since the range given is 50Hz (at 7 o'clock) all the way up to 250Hz (5 oclock). Thinking that the half way point would yield 250-50=200/2=100hz. Turns out, when I chose 90 Hz cut off, the cut off was actually landing at about 9 oclock! There was a slight variance from amp to amp, and the setting was hard to hit. We're talking fraction of a mm to get the blue light to stay on. Anyhow, this meant my originally setting was adding a sh!t load of unnecessary noise muddying up the bass!
I'm so impressed with the CC-1, I'm going to get a SMD DD-1 so I can really tune my stereo. (Actually I want my gf to buy it for Xmas since, sh!t, I did buy her daughter a truck and all!)
Further more, even if some one can tell you where to turn the knob to blindly attempt to match your head unit, how do you know the location is legit? And are they using the same head unit? Did they verify if with a test tone? It never ceases to amaze me that "we" (yes we) enter something blindly, are given direct......direction, and yet "we" say "Thanks, but I just need the answer to my question.There's got to be a ball park setting."
You inadvertently opened yourself up to the banter. Don't feel bad, we all were there once. We all learn as we go.
Here is a link. Get a freaking multimeter and do it right. When you can get the good stuff, than you're really see what you have been missing.
Worst method ever of setting the gains, worse then setting the gain by eye..
lol I have to chime in for old times sake. DMM method is fine. it was the way everyone did it for decades. Ohms law hasn't changed. Used a dmm to put 24kw to one mayhem in a team mates car, 12k to two mayhem 12"s in mine, 3k at .25ohm, plus plenty other systems, and ran them hard for competitions. guess what, I never roasted a coil and had the loudest musical 12"s for a while until someone came after me and ran their amps at .17 strapped or some shit, also tuned with a DMM.
as for HU clipping. buy a good HU, leave everything flat, and take 25% off the max volume, or more. sure I'd advocate using an oscope but if you do those three things you wont be roasting any coils from head unit clipping.
go ahead and argue. I'll just chuckle to myself.
*disclaimer for internet rage. Note that I didn't comment on or claim "the best method" only arguing with this guys extremely horrible understanding and comparison*