As Law inforcement officers like to read these sites it is good to know and tell others that the headphones have one side totally disconnected and the sound insulation is rendered inoperative on that side. These headphones may look standard but they are extensively modified ( like all Cobras ) to meet the required ADR standards. I have discussed this with several law enforcement officers and it seems that Doof Doof car drivers don't recognise the use of the modified headphones and prefer a system that can be shared with the rest of the neighbourhood.
