Join Date: Feb 2007
Location: California Republic
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Think about how we derive an ideal target curve. By this, I mean the custom curve which sounds subjectively best, to you.
Starting with a baseline curve e.g. flat, you tweak and listen, tweak and listen and repeat as necessary until you've designed a target curve which you find ideal. As part of this process, a filter set has been created to yield that curve by comparing measured response to the target curve.
Now, let's assume that a) you've used some perfectly accurate, error-free, mythical mic to do this and b) that we "anchor" the target curve @ 10kHz to be 0dB i.e. all other frequencies in your curve are relative to that 0dB, 10kHz point. The filter value @ 10kHz is zero.
If you'd used mic A from my earlier example, it would measure +1dB at 10kHz and when the filter set is calculated it would include a -1dB filter @ 10kHz. If you'd used mic B, it would include a -2dB filter @ 10kHz. In either case, your ideal target is achieved, and which mic was used is immaterial.
Does this help?