Sennheiser cancels the outside world

Gadget of the Day: Sennheiser CX 300 Sennheiser has long been the master of the in-ear headphones – now it's sprinkled some noise-isolators with its m

Gadget of the Day: Sennheiser CX 300

Sennheiser has long been the master of the in-ear headphones – now it's sprinkled some noise-isolators with its magic audio dust