S13 is Justinas Mikulskis, a DJ and Producer from Lithuania. He has appeared on Liquid V Club Sessions Vol3 compilation CD along with tracks by Roni Size, Lemon D, Makoto and others, released on respectable Liquid V Label. He also released two EPs - "End EP" published by IM:Ltd, also known as Influenza Music Ltd, and "Yourself EP" released on his own Secret Thirteen Music imprint.