Because his speakers are actively crossed over they require separate channels for each driver. His speakers are designed and built by himself. Your EQ is analog. The Behringer that WmAx is using is a far more complex and effective piece of equipment. Using computer software he can measure how the speaker produces audible frequencies and correct them, all of them, with the Behringer. The nature of the Yamaha EQ is rather simplistic and no where near as refined. Chris would regard most, if not all, analog equalizers as being less than desirable because of their inherent limitations.
Analog equalizers boost a band and they create a hump with a peak or dip. If you've ever seen what peaks and dips look like only an oscilloscope you may know what I mean. Say for example you want to adjust the 2kHz slider to a higher position. When you raise the slider it doesn't boost just one frequency, it boosts a "band" of frequencies. As the 2kHz position increases the frequencies in front of and behind come up with it, but not to the same intensity. The further the frequency is from 2kHz the less it is affected by the EQ.
This was the best example I was able to find quickly, it doesn't directly relate since it doesn't use Hz. However you can still see the point being made with the bell curve.
This isn't to say that equalizers such as yours are without purpose, just that Chris is an audio perfectionist and that you will have to accept he will recommend only what he absolutely knows will give you accurate performance.
