You dont need to send the DC's to the originial sales outlet to effect repair. The authorised repairer in the UK is HSL Headset Services based in Shoreham who look after all warranty issues for DC as well as Bose and a few others besides. On the earphone of the DC's is a 4 digit code which equates to the month and year of manufacturer. As long as the headest is less than 5 years old then you are covered by warranty, irrespective of how many hands may have owned the headset. Just send the headset along with a repair form which you can download on HSL's website and they will take care of the rest.