The JBL MTC-29UB U-Bracket is an optional accessory designed for use with the JBL Control 29AV and Control 31 loudspeakers, offering a robust alternative mounting solution to the included InvisiBall system. Constructed from heavy-duty 11-gauge steel and finished with a durable polyester-based powder coating (available in black or white), the MTC-29UB provides a secure and stable mounting platform. It allows for the installation of Control 29AV speakers on flat, sturdy surfaces like walls, decks, or ceilings, especially when the integrated InvisiBall mounting structure is not suitable or desired for a particular installation scenario. This bracket also enables a degree of swiveling for aiming the speaker after installation.