So, with the POD, and the new BAM (This sounds like an old episode of Batman... BAM! POD!), how exactly does one model an amp? I was reading about Fender's UltraNewCyberMegaTwin amp, and how it "reproduces the pot tapers of the orginals" and yada yada. How does one "achieve" the sound of another amp? I mean, are they adding EQ to the input signal, to match the common frequency curves of the amps? How accurate are they in "coloring" the tone to make it sound like the original? I read somewhere that Acoustics have a frequency bump at around 200 hz, is that all they are doing? Adding bumps and dips? My basic question is, what IS amp modeling? What do they do to change the tone? Does it work well?