Founded in 2011 in conjunction with the matrix project, Ensemble Experimental (ENEX) was created as a soloists' ensemble for music with live electronics and is associated with the SWR Experimentalstudio in Freiburg i. Br. The Ensemble wishes to do justice to the special performance demands of this genre through studies and intensive rehearsals in order to prepare concerts and recordings in an exemplary fashion.

Some of its members have worked for the SWR Experimentalstudio for a number of years, in some cases taking part in the creation of new works in the studio, as did Roberto Fabbriciani with Luigi Nono. Alongside regular performances with Matrix and at the Jetzt Musik concerts (former: ars nova) of the SWR and the ZKM, they make and have made guest appearances at festivals in Austria, Slovenia, Norway, the Netherlands, Brasil, Poland and Switzerland. The ensemble's CD series (in cooperation with the SWR Experimentalstudio) is currently in production at NEOS. The artistic director and principal conductor is Detlef Heusinger. Guest conductors have been Pavel Baleff, Steven Loy and Peter Tilling.