9 points
I’m with Penko on this. In fact I seem to recall an incident I read about where a crew did exactly that. Might have been a CHIRP (UK) report. Turned off the volume and forgot about it. I’m pretty certain it’s not “wave interference” because one wouldn’t expect to see a time delay between the headphones and the speaker. However, I’m niether a fan of the loudspeaker being set too high either. It’s only my personal opinion but I see the loudspeaker as a backup in the way that PENKO is suggesting. We might all say we couldn’t make a simple error like that but maybe on a four sector day or at 30W in the middle of the night.....