Originally Posted by
Retsek
Possibly a very silly question here from a newbie, but would appreciate an answer from any current owner of a Bose A20 headset as I’ve found conflicting answers online…
I’ve just purchased a second hand pair and when they are turned on in a quiet environment (plugged in or not) there is a very noticeable hissing/static noise, about the volume of a running tap. This becomes less noticeable with louder background noise, in a GA aircraft with the engine running it can barely be heard at all - is this normal for an ANR headset? I just want to check as they were advertised to be in perfect working order.
I’ve tried cleaning them out and changing batteries.
TIA
What kind of AA batteries did you use? One (surprising) thing I noted a few years ago when I tried Energizer Lithium batteries in the A20 is that they didn't work well. There was a weird hiss that's never been there with any alkaline battery. While both nominally 1.5V, the Lithiums have a higher initial voltage - unsure if there's any other characteric that might have contributed. I just shrugged and went back to alkalines.