How does it work together? Is there anything I can read, or can anyone help me put this together? They say (or rather, it is true that) 10 db is twice as loud, right? As far as sensitivity goes, 3 dB is twice as loud? How did wattage relate again? As far as impedance goes, provided the amp impedance matches cab impedance, for speakers with the same sensitivity, there should be no difference in perceived volume, right? Or is there a difference when using the same amp but different impedance settings on that amp? And mismatching impedance, will a 16 Ohm amp output to 8 Ohm cab louder than 8 ohm to 8 ohm, or 16 to 16? As far as changes in impedance, is there any quantitative expective difference? And adding speakers? 2 vs 4? I'm looking more for the theoretical answers, not so much practical, though all comments are welcome. I'm not posting thinking I know something, I really like learning. Thanks.