Are these measurements done in an anechoic chamber or in a well treated studio room? Seems to be the latter according to the waterfall graphs, doesn't it? If so, these look really flat, especially when engaging the LF- and HF- at the back.Here are some measurements of it:
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It would be good to see how would it look in Amir's setup. Preferably with and without HEDD Lineariser.
Compared to the KH310 I would expect that the LW is more balanced there than with the Hepp Type 20, because for example the vertical radiation of the KH310 should be more linear at the transition from midrange to tweeter.
Maybe Amir will get both speakers to measure, then we will have certainty.
As written above, it is not possible to correct the errors in the radiation, they can only be compensated by changing the on-axis FR.
When the "Lineariser" linearizes the frequency response on axis, it gets exactly the radiation that the normalized spectrogram shows.
I also participated at an online presentation, where the founders were talking that they chose the Type 20 to match all the other monitors of the MK2 range soundwise. So according to that, the type 20 could show better measurements than the type 30. Interestingly when looking at the FR correction EQ of their lineariser plugin in plugindoctor, the correction curve of the Type 20 is flatter, than the one of the Type 30.
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