Thunder drum
From Wookieepedia, the Star Wars wiki.
The thunder drum was a large, 2-meter high percussion instrument that required two people to operate it by swinging huge mallets at the drum heads.
Traditionally a Weequay instrument, thunder drums were often found in Sriluurian monasteries devoted to Am-Shak, god of thunder. Ak-rev of the Max Rebo Band was a masterful thunder drum player.
