Home Father's Day Massdrop x Sennheiser HD 6XX Open Back Headphones (Rebranded HD650) $200 Father's Day Massdrop x Sennheiser HD 6XX Open Back Headphones (Rebranded HD650) $200 By ARCOM - 16 June 2018 175 0 SHARE Facebook Twitter Go to the deal page: Massdrop x Sennheiser HD 6XX Open Back Headphones (Rebranded HD650) $200