Posted March 29, 2011 by subzero in Audio, Daily News, Headphones 3914 Sony unveils MDR-RF865RK wireless and MDR-NC13 noise cancelling headphones Sony today adds two new model to its 2011 headphones offerings — the MDR-RF865RK wireless headphones and in-ear noise cancelling headphones named MDR-NC13. The first are fitted with 40mm driver units with frequency response of 10-22,000... Read more Tags: in-ear, MDR-NC13, MDR-RF865, MDR-RF865RK, Noise Cancelling headphones, Sony, sony MDR-NC13, sony MDR-RF865RK, wireless headphone