RSLG Quartet is a band formed in Athens in 2014 by Vassilis Roupas (piano), Mihalis Soulakis (bass), Yiannis Leloudas (drums) and Stelios Yiannoulakis (electronics). In 2015 Panagiotis Raptis (saxophone) joined the band.

The Quartet plays avant-garde music using structured improvisation with jazz, electronic, noise and contemporary classical influences. The band's debut album "Interplay" was released in 2016.