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.
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."
All tracks written by John Zorn.