50th Birthday Celebration Volume 4 is a live album by Electric Masada documenting their performance at Tonic in September 2003 as part of John Zorn's month-long 50th Birthday Celebration.
Reception
The AllMusic review by Sean Westergaard states "This is a fantastic ensemble, with lots of time spent playing together, and Zorn knows how get the best out of them. Fans of the Masada series will not be disappointed. Excellent."