According to what I checked, the SPL where the problem of each frequency starts to be audible in the sample I have is as follows.
233hz / 77.9dB SPL
296hz / 75.0dB SPL
300hz / 79.2dB SPL
355hs / 80.5dB SPL
And the coaxial driver assembly inside this speaker had this separate space.
View attachment 223615
View attachment 223616
To diagnose this problem in detail, I placed it as above and tested it by changing various conditions.
However, the problem was the same if only the woofer driver was operated alone or, on the contrary, the coaxial driver was operated alone.
So in my opinion, it's highly likely that this isn't a unit problem.
The assembly or wiring condition of the internal structure is expected to be the cause of the problem.
(Or maybe it's a problem with the plastic enclosing the coaxial unit.)
And before I took this speaker apart, I recorded it all to tell you about it, and the recording was done on-axis 10cm from the front baffle.
I realized it belatedly, but as it may not be a direct problem with the unit...
Proximity recording samples did not easily reveal the problem because the percentage of output signals was high compared to the noise currently being revealed.
I will prepare a microphone for checking SPL and a microphone for recording problems separately and compare them.
And now, we have ordered a long cross screwdriver for the disassembly of the coaxial assembly.
@KaliAudio_Official , could you please test the above mentioned frequencys and SPLs (or higher)