The Lambeg drum, together with the bagpipe, is said to be one of the loudest acoustic instruments in the world, often reaching over 120 db. It measures approximately three feet and one quarter inch (0.9 m) in diameter and two feet (0.65 m) deep, and weighs 35-40 lbs.
Nice shot. There's something rather odd about the left side of his head (to the right of the photo): sharpening artifact, perhaps?
Someone once defined a gentleman as a man who can play the bagpipes and doesn't. The same could, it seems, be said in relation to this drum!