Top Definition
A State of Trance 400 was a 72 hour celebration of Armin Van Buuren's 400th radio show. It will go down as one of the greatest weekends in trance music history. This event set the bar so high that it may be tough for even Armin to come up with something more memorable.
ASOT 400 was Armin's finest achievement.
by Trance fan April 21, 2009
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