A speaker assembly is provided with a cabinet with laterally spaced apart side surfaces and a frame mounted to one of the side surfaces. The speaker assembly is also provided with a lever arm and a ratchet mechanism. The lever arm has a proximal end to connect to an upper support, a distal end with a plurality of teeth extending radially outward, and an intermediate portion pivotally connected to the frame for adjusting a splay angle of the cabinet relative to the upper support. The ratchet mechanism is coupled to the frame with at least two pawls each individually biased to engage at least one of the plurality of teeth to allow pivotal motion of the lever arm relative to the frame in a first direction and limit pivotal motion of the lever arm in a second direction that is opposite the first direction.