But I think DC Pro-X may be even better for jet pilots in quieter cockpit.

Where the DC Pro fell short of my expectations was in the noise attenuation and noise canceling departmentI recently flew a 737 (Notoriously noisy cockpit) trip where I compared my Bose A20 to my David Clark DC Pro in a side by side comparison over a 3 day 18 hour trip.

The David Clark PRO-X is by far the best solution for airline pilots flying in a noisy cockpit (such as B737 which is what I currently fly).

So a good effort from DC but not a viable option in noisy cockpits

I am an ERJ-145 pilot and it does a superb job canceling out the white noise in its rather loud cockpit, and it is comfortable enough to wear for 5-8 hours a day with no problem

It is lightweight, compact and does a wonderful job of quieting the cockpit of the company King Air.

It flashes every few seconds and really bothers you in a dark cockpit

The 747 is a loud cockpit and it definitely tames the wind noise at higher indicated airspeeds; 340 knots plus

I am working to try and find a good ear plug to wear underneath these in the noisy 737 cockpit just for some extra high frequency noise reduction.

For jet pilots, Pro-X may be better suited than Bose A20 because of comfort, and ironically A20's superior noise reduction may actually become a disadvantage in quieter cockpits (several said A20 made it hard to hear their co-pilots).DC Pro-X's construction/material quality is excellent.

but if you turn it on it is a very noticeable difference in how quiet the cockpit can be

For them who wants a comperation with A20 I can say that I fly 737(700-800-900) and I am sure you know it has a noisy cockpit

There's never been an issue hearing any of the cockpit chimes and alarms, flight attendants knocking on the door, etc

Works well in noisy jet cockpit.

I'd recommend paying for the cheaper version if you are flying something with a quiet cockpit unless you find you need to use a Bluetooth paring device.

This is a very comfortable and compact headset, but is suitable only for quieter cockpits

Would buy again and highly recommend for any noisy cockpit