AKG Pro Audio K612PRO Reference Studio Headphone<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Open-back design </span></li><li><span class="a-list-item"> Patented varimotion diaphragm technology </span></li><li><span class="a-list-item"> 120 ohm impedance， 12 hz - 39 Khz responce </span></li><li><span class="a-list-item"> 101 dB SPL/V </span></li><li><span class="a-list-item"> Only 238 g in weight </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LAm0aFVtL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41pCHI63lqL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/417T%2BIMajgL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41DMLBhhcuL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41V8JzVnPeL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41ZU4Byh%2BtL.jpg" noproxy>