Cluster

The most important and consistently underrated space rock unit of the '70s, Cluster (originally Kluster) was formed by Dieter Moebius, Hans-Joachim Roedelius, and Conrad Schnitzler as an improv group that used everything from synthesizers to alarm clocks and kitchen utensils in their performances. Continuing on as a duo, Moebius and Roedelius eventually recorded many landmark LPs -- separately, as a duo, and with all manner of guest artists from Brian Eno to Conny Plank to Neu!'s Michael Rother -- in the field of German space music often termed kosmische. Cluster also continued to explore ambient music into the '90s, long after their contemporaries had drifted into tamer new age music or ceased recording altogether.