These are some older plots of the HD 598 made by Tyll Hertsens of Inner Fidelity btw...
There are a couple interesting things to maybe notice in the HD 598 graphs, in addition to the slight dip in the upper mids around 2 kHz (Tyll seemed to prefer more of a rise there than the HD 598 has, though I didn't necessarily always agree with that.) Distortion seems to be a bit higher on the right channel than the left.
There is also a fairly significant rise in the headphone's impedance in the 100 Hz range of the bass, which is not uncommon on some Sennheisers. And this might effect its tonal balance when used with a higher impedance amp.
There are a couple interesting things to maybe notice in the HD 598 graphs, in addition to the slight dip in the upper mids around 2 kHz (Tyll seemed to prefer more of a rise there than the HD 598 has, though I didn't necessarily always agree with that.) Distortion seems to be a bit higher on the right channel than the left.
There is also a fairly significant rise in the headphone's impedance in the 100 Hz range of the bass, which is not uncommon on some Sennheisers. And this might effect its tonal balance when used with a higher impedance amp.
Last edited: