Creating an outdoor PA system sound

[Trebor]

I want to simulate the sound of a PA system set up in an outdoor setting,
where you get some echo from nearby buildings, but faint, also with the reverb that goes with it.

There is a PublicAddress plugin for Audacity.

There are free room-simulation VST plug-ins which work in Audacity on Windows, e.g. …

Space360 by cytoSonic - Reverb / Room Plugin VST

Stereo Touch by Voxengo - Imaging Plugin VST VST3 Audio Unit AAX