Good morning, everyone.
RAA measurements (artificial head)
Other Kennerton Thekk measurement (flat baffle).
For all those who would think that the Thekk lacks bass and extension in the sub-bass, here are my own measurements of the Kennerton Thekk versus the Thror and the Odin mk2, measured on the same measuring platform, a flat baffle consisting of the leather seat of my sofa and the use of a professional portable measuring microphone PHONIC PAA3: dynamic range: 30 to 90 dB SPL; each horizontal line corresponds to a sound level difference of 10 dB SPL (floor at 30 dB SPL).
The left-most vertical bar corresponds to the global SPL (all frequency) and reflects the difference in average sensitivity of the 3 headphones listened to on the same amplifier (pink noise) with the same volume position of the amplifier knob for the 3 headphones (Nb: the Odin being the headphone with the highest average measured sensitivity: 97.5 dB SPL; the Thror, having the lowest sensitivity measured: 93 db SPL).
The measurement trough at 6 KHz is probably a measurement artifact; on the other hand, the frequency peak around 9-10 KHz is well present.
To obtain a good seal of the pads on the measuring rod, I exerted a rather strong pressure on the pads, as you can see on the pictures.
Kennerton Odin mk2
Kennerton Thror
Kennerton Thekk
EDIT: 3 new measurements of the same Kennerton headphones (Odin mk2/Thror/Thekk), with a pink noise level 10 dB SPL higher than in the first measurements above, to further improve the signal-to-noise ratio, especially in the sub-bass.
(NB: Measured frequencies: 20 Hz/25 Hz/31.5 Hz/40 Hz/50 Hz/63 Hz/80 Hz/100 Hz/125 Hz/160 Hz/200 Hz/250 Hz/315 Hz/400 Hz/500 Hz/ 630 Hz/ 800 Hz/ 1 Khz ... etc.).
Kennerton Odin mk2
Kennerton Thror
Kennerton Thekk