I don't know anything about these headphones except I have always liked Sennheiser and Amazon sells them new for $250, or $180 refurb. http://flash.newegg.com/Product/N82E16826106790?nm_mc=AFC-dealnews&cm_mmc=AFC-dealnews-_-NA-_-NA-_-NA Link to Amazon: http://www.amazon.com/Sennheiser-505573-Amperior-Headphones-Silver/dp/B009QV14MC/ref=sr_1_2?ie=UTF8&qid=1428803630&sr=8-2&keywords=sennheiser+amperior 90 day warranty.
