ANC not available - passive but top

Deductions of 5 stars:
- The ANC produces a constant noise. Especially with silent music level this falls on strong. Minus point.
- The ANC changed the Fequenzbereich of the input signal. This is actually the function (or the effect of the function) of the audio postprocessing - But not so! Many frequencies in the central region are down regulated. For this, the ANC creates a fatter bass that makes overridden in loud music level and sometimes even for clipping. Consequence: equalizer readjustment of the source player - no-go! In addition, the compression of the ANC produces extremely unpleasant dynamics and volume fluctuations - this was me actually still worth a minus point, but 1 star is the KH now not deserved. So only 1 point.
- The ANC filters the ambient noise totally inadequate. Competitive way better! Minus point.

Thus, unfortunately, remain only 2 stars.
The following positive factors are unfortunately so irrelevant, of course, or the price is not appropriate that I like it awarded no pluses.

Other:
- As passive headset very well suited (with switched ANC) - natural reproduction. But that does not make a 250 headset for consumer!
- Good passive noise suppression thanks to high-quality sound-proofing of the earcups.
- Supplied cable accessories very well - you can at the price but also expect
- Processing Okay, not excellent (joints seem more unstable despite metal fitting, "plastic" haptics everywhere)
- Interchangeable Headband - is nice, but who needs that?

Conclusion:
The "active" function, ie the Active Noise Reduction is useless, since the frequency response is changed too much and this (see above) leads to negative sound effects.
Therefore, only for use as passive headphones, which then totally overpriced.