Do that and you will have clear sound. They sound a bit better with the NC off anyway. These are very comfortable and a good price, but just after two days of wearing them in the house the foam was already starting to become flat and its not like im standing 24/7, if anything im sitting for the most part with them on my feet so that was a little disappointing. Most of the important settings are accessible from the unit itself, including changing tracks, volume, EQ and gain. This is an unacceptable quality assurance issue. I got them onto a 5. Love that I can now cook without the annoyance of digging around for the spice I need! IVE BIKED FOR 60 YEARS, HUNG BIKES UP BY THEIR WHEELS, CROSS BARS AND HANDLEBARS, BUT THIS ONE IS THE EASIEST TO INSTALL AND TO SIMPLY LIFT THE BIKE INTO PLACE. The metal looks like glass on the inside so it’s obviously terrible quality metal that’s been heat treated far too hot. I get lots of compliments at work.