This is a modified Razer headphone converted to an open-back design. It has also been modified to support re-cabling. The modification took about 3 hours. The sound is not muffled and is tuned very clearly. The bass is moderate but still present, and there is some extension in the high frequencies. The soundstage (sound spread) is wide. I recently made this for my audio hobby, but I don't use it much, so I'm selling it. Please note that there is a handmade feel in some places due to the use of a glue gun.