Recording Comms

[Foto_Flyer]

I have a mate who has finally embarked on the journey after 20 years of trying. As a result he wanted to do everything right and has spared no expense. He bought the latest Bose A20 headset and couldn't be happier. However, he also intended to audio record all the cockpit conversations and radio comms and so purchased a ready-made lead with the integrated filter etc. While it appears to work fine with other standard headsets, when he plugs the Bose in the audio cuts out for the headset. Has anyone else out there had this experience? Is there a particular lead that works with the Bose. I did suggest the lapel mic in the ear cup idea (that's what I use, works great), but he would rather use the patch lead.