Finish in-ceiling audio installs with a purpose-built pair of back enclosures for PID 4104. These enclosures help define the rear space behind the speaker, supporting a cleaner installation and a more controlled acoustic environment than an open ceiling cavity. For integrators and facility teams, that means a more consistent result across rooms, fewer variables in the ceiling plenum, and a neater final appearance. A back enclosure is often the difference between a basic speaker cutout and a properly engineered install. By creating a dedicated rear chamber, this pair helps reduce exposure to dust and debris while giving the speaker a more contained mounting environment. That matters in commercial spaces, multi-room residential projects, and retrofit jobs where reliability and finish quality carry real weight. Specified for PID 4104, this pair is intended for installations where compatibility and repeatable fit are essential. It is a practical choice when the goal is to deliver a cleaner, more polished result without adding unnecessary complexity to the job.