The SP-131 can mount a wide horn speaker or horn speaker on a pole in conjunction with the optional YS-60B. It is comprised of two brackets. Note: For added safety, reinforce mounting brackets and mounting bands when installing a speaker in a location that will be exposed to significant vibration and/or strong wind. It is also recommended that the installed speaker, mounting brackets, and mounting bands be checked periodically to assess potentially dangerous excessive wear and/or loose connections.