German headphone maker Ultrasone's HFI-580s block out noise without plugging up your ear canals or using active cancellation circuitry. The S-Logic "natural surround" technology and radiation shielding may seem gimmicky, but these great-sounding cans give our trusty Sennheiser HD280 Pro's a serious run for their money. To our ears, they're best suited for applications where sonic accuracy is key; though we'd have virtually no qualms about recommending them for casual as well as critical listening.



Link: Digitaltrends