Careful comparing my measurements for the low end compared to the models. The model is just that, a model. Normally I'd take the measurement, except this was a near field I did. The (old) research says near fields are anechiic up to a certain freq., related to driver size, by in my personal experience, this is not always the case. And in this case, I'm suspicious of my own measurements. Going outside often changes the result, sometimes significantly. Judging my measurements, I have the el70 in a high q enclosure with an F3 below 70hz ??? I doubt it. I probably shouldn't have even posted it. One day I'll go outside and measure ground plane or at 6 or 12". That would be much more reliable in my opinion.
If my near field is righ, then that's amazing and I might build a bigger box
If my near field is righ, then that's amazing and I might build a bigger box
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