I wanted to get back to this because I realized I could be read as dismissing you, which I certainly do not mean to do. I tried recreating the variant measurements in my living room, but it didn't come out like it did in my basement, which is a very problematic space with low ceilings. I may try there tomorrow.
However, in these new measurements there are little differences that I didn't catch before. I tried very hard to get them measured as similarly as possible, but it must be said that these are not gated measurements and are not done in a lab, obviously. I got these differences that I was able to recreate:
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Focusing only on the resonance at 15kHz, yes I could see this as unit to unit variations due to more lax quality control (possibly the boost at around 2k too). I also noticed that one speaker tweeter finish is flush while the other isn't. Maybe this has something to do with it. Maybe not.
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I certainly expect these kinds of differences at this price. $130 shipped from China to the US and then cross country guarantees this. And I also wanted to make sure all understood that even a small mic movement changes the measurements. Here is the mic moving a just a tiny bit up and down.
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But I do think that these kinds of what I would call small issues do not account for the difference between Amir and Erin's versions, which are tonally very different speakers. It's like Erin's have some high shelf boost. I am a total amateur however, so what the hell do I know.
@tw 2022: For full transparency, these are the measurements from the basement that I called the same. Given everything, I think it's a fair description. I was never going to trust anything below 4kHz. Resonance looks similar enough.
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