These are a GA twin plug pair so they don’t have an Auto-on switch.
The switches are positioned as follows:
BT/AUX : BT
INTERCOM : MON
AUTO OFF : ON
Connecting/disconnecting from
Bluetooth doesn’t change much, unless I play something loud enough through the Bluetooth to drown it out.
I’ve tried a pair of rechargeable AAs, as well as Energizer Max alkaline batteries, I can’t perceive any difference in static noise between the two.
I’ve got the number for Bose aviation support now, so I’ll give them a call tomorrow to see if they can shed any light.