VSONIC 2013 Latest GR02 R02 Nostalgia Edition Silver Cord Noise Isolation Earphones Earbuds IEM Compare to the old edition, R02 2013 Nostalgia Edition has been improved significantly on sound field More delicate voice, and more powerful low-frequency texture Upgraded performance and appearance of texture Exceeds performance of even much higher prices sets Frequency Response - 8Hz-28KHz and Sensitivity - 105dB