Doublepulse (real name Steven) is a member of DLR and one of the YouTubers that upload videos about Minecraft and other games. He's known as "DP Productions" on his YouTube channel. He also has another channel, in which he and another youtuber called Thunder uploads videos, called "Thunder Pulse Gaming".
After partnering with Thunder on their channel, Doublepulse became less active in DLR, making him a semi-active member.
His current and most used username is Doublepulse comes from his old username that was created during his old days when he played an old fashioned game called "Runescape". It is unknown how he came up with this username.
During Tekkit, he took a role of an antagonist with a temporary username Evilpulse.
Although, his official username is Doublepulse, he's always called by his real name Steven by everyone.