Originally Posted by
CrazyStuntPilot
The volume output between the PA key on the ACP and the PA handset is the same.
This is one of those things they teach in your 320 and 330 fleets that falls into "we've always taught that."
Hope this helps
True, but there are differences in headset microphone output, sensitivity, distance from mouth etc. This is why some companies stipulate that routine passenger address announcements are performed using the handset, and the ACP PA button is used for emergency, non-routine or procedural announcements e.g. "cabin crew seats for takeoff" etc.