The mighty Ampeg BA108v2+ in action. The dongle in the AUX IN is a Bluetooth receiver. A mic (SM58 because of course) picks up the metronome clicks from the smrtphn. The mic connected to one channel of the PreSonus Audiobox USB 96, and the instrument is connected to the other channel. This is how I play with a metronome in a Zoom lesson.
Turning off the mic when I record to the Webcam means I can play to the metronome as a click track when we need to sync videos.
The line hanging off the Bluetooth receiver is just a short USB charging cable that I have no reason to unplug from the unit. lol.
The volume control for the AUX IN line is one of the strongest features of this amp. I don't know why more amps don't have one.