Hello to all.
I'm not sure that the new Kennerton open planar headphones, the
Heartland (HL) which succeeds the Thekk is more balanced than the
Thekk, with the original Heartland pads (black FR curve) and even worse with the Heartland (bass-boost) pads (red FR curve) compared to the FR curve (green) of my Kennerton THEKK (SN TK 001).
The most balanced headphone to my knowledge being the
Sennheiser HD 560 S ...
(Nb: see the FR curves, but on another measurement bench, of my Thekk versus Sennheiser HD 560S): the Thekk is cruelly lacking in upper-midrange, and this can be heard clearly on female voices and guitars which are too muffled in the 1000 to 4000 Hz frequency range.
Kennerton Heartland FR (with the two different pairs of ear pad : black curve (standard pads) ; red curve ("bass-boost" pads)
Kennerton Thekk FR (SN TK 001, my copy)
Kennerton Thekk FR (SN TK 001, my copy)
Sennheiser HD 560S FR (my copy)