This is a great headset for General Aviation, but average for commercial carriers. Here are my reasons why it has problems for commercial flying:
1. The control box is extremely heavy. Since most commercial jets have plugs overhead, the box swings around and can hit you in the head. Other headsets I have used all have a clip to attach the control box to the aircraft to keep it from swinging. The Zulu PFX does not. The cord is not long enough to place the box on a side rail, so it just swings. The weight also will often cause the plug to come undone, losing communication.
2. The headset is so great and sealing around your ears that you effectively lose the ability to hear cockpit communication. Since commercial jets do not have the hot mic feature of GA, you have to listen to what other crew members are saying. With both earpieces covering the ears, it is almost impossible to discern what is being said. You must have one earpiece off your ear to effectively hear.
3. Battery life is very short. Both sets have lasted about 6 hours. No bluetooth, and use is only during climb, descent, and overseas position reporting. Such a short battery life means it works for one leg only, which is inconvenient for international flying.
4. The main cord is just a little too short. With the connection overhead, the cord is not long enough to lay the headset on the side console. There is a clip for headsets, but the Zulu PFX has such a wide headband that it will not fit in the clip. There is no way to use the clip, as there is with other headsets. Lightspeed needs to add a clip to the control box, as well as providing a loop or something similar to the headset to hang it from commercial aircraft provided clips.
Overall, this is a great set for blocking cockpit noise and hearing ATC communications clearly. But there are some CONS that commercial pilots need to be aware of when using the Lightspeed Zulu PFX.
November 7, 2014 UPDATE
My Zulu PFX did NOT come with a clip for the control box. I was informed by
Lightspeed that it was supposed to. So the clip will help mitigate the mounting
Second, if you use the app, you can adjust the settings for battery
conservation. Once I did this, I was able to get much better battery longevity
Third, I found out that the LIghtspeed Zulu PFX is not TSO certified, meaning
that it technically is not authorized for use in commercial aviation. It worked
fine, but whatever TSO certification does or adds, the PFX has not been