With ANC on, both highs and lows are slightly muted in favor of a more flat reproduction, but with the tradeoff of a more "isolated" listening environment

To be clear even with an EQ is use I would not recommend using ANC in always on mode or in quiet listening environments (i.e. inside the home with normal background noise or library) as the passive sound isolation provided by the seal and padding of the ear cups are good enough in those cases

The ANC is not ground breaking; in a noisy environment this will not get the job done

I would say ANC is a nice feature for noisy environments

However, in louder environments, say a loud AC-Unit and a blasting television set, I found the noise cancelling quite useful and it worked well

Personally I would much rather loose a little dynamic range far more than cranking up the volume to dangerous levels to try to overcome noisy environments

I like my music really really loud and the F2

and I now very happy with them

This tech is not the same as "shooting/sport" headphones like Howard Leight by Honeywell Impact Sport Sound Amplification Electronic Shooting Earmuff, Classic Green (R-01526) and as such, should not be used for shooting events or something similar

n’t recommend these due to the lack of ANC.******************Update****************************So Bludio customer support is almost non-existent.