GX Jupitter-Larsen (sometimes erroneously spelled Juppiter-Larsen) is an artist, based in Hollywood, California, who has been active in a number of underground art scenes since the late 1970s.

He is the founder and sole permanent member of the noise act The Haters, who have performed all over the world, and appeared on over 300 CD and record releases.

[2][3][4] Underlying all of Jupitter-Larsen's work's a peculiar mix of aesthetic and conceptual obsessions, particularly entropy and decay, professional wrestling, and a self-created lexicon consisting mainly of personalized units of measurement such as polywave, the totimorphous, and the xylowave.

Jupitter-Larsen says his transexpansion numeral unit (TNU) explore the distance & separateness in between linear counting locations that do not neighbor each other.

[5] In an article entitled "30 Years of the Haters" which appears in the premiere issue of the magazine As Loud as Possible a number of early performances by Jupitter-Larsen are listed.

[10] A book of French translations of his essays and short fiction, entitled Saccages has also been published by the Lausanne Underground Film & Music Festival and Rip on/off.