Koss UR40 Over Ear user reviews : 4 out of 5 - 1 reviews - audioreview.com
Jason Marchesano on Twitter: "Trying out Koss UR40 open back headphones tonight that I picked up for $31. Hoping not to blow them up with my Schiit Asgard 3. Initial 1 hr
Thick Soft Leather Ear Pads Foam Cushion EarMuff For Koss UR40 UR 40 Headphone | eBay