Fidue a65 hifi in ear sound isolating earphones fidue a65 hifi in ear sound isolating earphones are built using micro dynamic drivers with titanium composites the earphones are housed in a beautiful rose gold coloured triangular metal casing making them durable and perfect for heavy use without adding too much weight the a61s offer a clean clear and balanced hi fi quality sound built to last the fidue a65 features a robust construction perfect for regular use on the go the textured metal jac