Nope. He nailed it. I do however have a different way of explaining it which seems to work well enough for those new to EQ. EQ is much simpler if you break it down. Everyone has owned a stereo or walkman that has a basic 3 band EQ that has only got Bass, Mid, and Treble. Lets pretend for a second that's all your amp has got. I would break your EQ up as follows:- Anything below 120Hz - Think of these as your Bass knob. 120Hz to 1K - Think of these as your mid knob. Above 1k - Think of these as your Treble knob. Once you understand that, you can see that each of the 3 bands can be broken down further into mini-groups of Low, Mid and Upper:- 40 - Low Bass 80 - Mid Bass 120 - Upper bass. 200 - Low Mids 500 - Mid Mids (he he) 1K - Upper Mids. 2K- lower Treble 5K - Mid Treble 8K - High Treble. And so on. A 31 band EQ just keeps breaking it down as I have above. It's definitely worth learning to master an graphic EQ. It's a very powerful tool, not only for tone shaping, but for eliminating feedback from your PA, for highlighting the strengths of your equipment, for covering up and areas where your equipment is lacking, and also for gear protection and damanage minimisation.