Re: Dial that sucker in
It's extremely vague, I must say. The author never explains what this 'threshold' is, what causes it, how you can tell when you have actually reached it, and provides zero audio examples. It also does not state how big a role your loudspeaker choice has in this equation and whether you are supposed to do this for each of your cabs.
My THEORY is that by 'threshold', he is referring to the zero crosspoint on each EQ band as it shifts from attenuation to boosting, but that does not make sense if you have passive EQ. Or is it related to capacitive restistance on that EQ band?
The author's advice to run your MV wide open is impractical for many reasons. It also does not take into account that very low (single digit) wattage amps can go into power valve distortion when the master volume runs out of headroom. Many times this is dictated in part by the guitar you are using ... so not having your guitar plugged in whilst doing this procedure seems counter productive.
Finally, the most important part of the equation -- the room -- is completely left out, and yet your room has just as much influence on your tone as anything else. And when you move your amp to another room, it will sound different. So, this Tonal Utopia lasts only as long as the amp never moves from the precise location it was dialed in at, and that room's response does not change (ie, best not close the shades afterwards!).