Deep Sentinel supports the Speco ASPC20 Amplified Speaker as "certified to work with Deep Sentinel."
This speaker contains a built-in 20W amplifier and is compatible with the Deep Sentinel Service and Deep Sentinel POE cameras.
To make this speaker work, please follow the instructions for the official Bullhorn Speaker. You will need a POE Splitter, and will need to splice this in exactly like the official bullhorn, with one slight modification.
The Speco speaker has a volume adjustment knob that MUST be turned down to this setting and tested--just slightly past the "Volume" arrow. This knob is ridiculously sensitive. If it is too low you won't hear someone speaking and if it's too high, it will literally overpower the POE system and force a reboot (which we definitely don't want during an intervention!).
You can test this using the PTT feature on the Deep Sentinel App.