NRG Ensemble was an American jazz ensemble founded in the 1980s by saxophonist/multi-instrumentalist Hal Russell. The group's personnel was somewhat fluid, but included a core of drummer Steve Hunt, saxophonist Mars Williams, guitarist/trumpeter Brian Sandstrom, and bassist Kent Kessler. Their music could be broadly described as post-bop. Russell was the primary composer, but the other musicians contributed songs as well. Their punning song and album titles (Conserving NRG) reflected the humor that permeated Russell's music.

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