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Quadrophonia were a Dutch/Belgian electronic music collective, formed by Olivier Abbeloos (also known as part ofT99) and Lucien Foort in the late 1980s, with several of their tracks performed by Marvin D (Marvin Tholen).

They had two top 40hits in the United Kingdom. "Quadrophonia", which reached #14 in April 1991, followed by "The Wave of the Future", which charted at number 40 in July of the same year.^[1] Three of their othersingles were "Find the Time (Part 1)", "Schizofrenia – The Worst Day of My Life" and "The Man with the Masterplan", all three of which were not successful. Later in the year the group released their only album,Cozmic Jam. Following their work in 1991 and 1992, Quadrophonia went on to release three more singles in 1993. They were "Intergalactic Crosstalk (Amazonia)", "Moondance" and "Warp Factor One"; as well as a couple ofremix singles in 1997 and 1998, called "Quadrophonia '97 (Remixes Part 1)" and "Quadrophonia '98 (Remixes Part 2)".

Quadrophonia also recorded under the aliasesCMOS,Holographic Hallucination, andWarp Factor 1 (as well asOrion on onewhite label release).

Marvin D ultimately introduced his friendRay Slijngaard to Phil Wilde and Jean-Paul de Coster, who together withAnita Doth later formed2 Unlimited.

• "Schizofrenia – The Worst Day of My Life" (1991)
• "The Man with the Master Mixes" ("The Man With the Masterplan") (1992)
• "Intergalactic Crosstalk (Amazonia)" (1993)
• "Moondance" (1993)
• "Warp Factor One" (1993)
• "Encounters of the Underground" (1993) – released as Holographic Hallucination
• "Dark Tales of X-Perimental Madness" (1993) – released as Holographic Hallucination
• "Hypno" (1994) – released as Holographic Hallucination
• "Care 4 Me" (1994) – released as Warp Factor 1
• "People (Don't Make Me Wait)" (1994) – Released as Warp Factor 1
• "Warp Factor One" (1995) – released as CMOS (note: This is a different single from the previous "Warp Factor One" single the group released under their Quadrophonia name)
• "Quadrophonia '97 (Remixes Part 1)" (1997)
• "Quadrophonia '98 (Remixes Part 2)" (1998)

• Quadrophonia at Discogs
• Olivier Abbeloos' Official Website
• Lucien Foort's Official Website
• Olivier Abbeloos on Soundcloud

• Musical groups established in 1990
• Dutch techno music groups
• Dutch house music groups

• CS1 Dutch-language sources (nl)
• CS1 German-language sources (de)
• Articles needing additional references from April 2007
• All articles needing additional references