# Third-party speaker templates

Third-party speakers are added and managed as templates within the **Array Builder** in HOLOPLOT Plan. To define a new speaker, the user manually enters the following parameters:

* **Physical dimensions** (for placement and modelling)
* **Horizontal and vertical opening angles** (used for coverage prediction)
* **Maximum SPL**
* **Usable bandwidth** (frequency range)
* **Latency** (in milliseconds)

Once defined, templates can be reused across multiple projects, speeding up the design process for venues that rely on standard non-HOLOPLOT speaker types.


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