Crites has all that figured out. I am no genius, but I can solder and follow directions, etc. Kind of like Turbo Tax..... just go through the steps. ha. I did my Forte' II's and holy buckets, do they sound great.
btw, when I got home with the HIII's, I plugged them into my living room system (Yamaha RX-A1060) first just to try them. Sounded like I expected.... Beyond great! I listened to T-Bone Burnett's "Criminal Under My Own Hat" , Bob Dylan's "Oh, Mercy" and Bowie's "Ziggy Stardust". Then when I re-plugged in my FII's, I thought I should compare with the same music fresh in my memory. The verdict is that they are damn close. Midrange with the HIII are freakishly great, but the upgraded FII's not far behind at all. Highs the same and of course better low end on the FII, but everyone knows that. This is what I determined. I could be wrong. But if I was blindfolded, the only way to for sure I could tell which was which was that the FII's have the edge in low freqs.