This Bose A20 ANR headset conversion is ready for installation in a flight helmet. The wiring has been converted to the standard flight helmet wiring configuration so that it will fit in many flight helmets, including HGU-33, HGU-55, HGU-68, HGU-56, HGU-84, etc. The assembly comes with Bose A20 ANR earphone modules, and separate wiring branch for U-172/U microphone jack plug with grommet for helmet installation and compatible with your helmet's current boom microphone. The ear cups comes with Velcro for attachment to the interior of your flight helmet. This Bose A20 assembly is also available for SPH-4 series flight helmets but requires a new/modified ear cup retention assembly to be installed in the helmet for proper installation. Our conversion of the Bose A20 headset has NOT been tested by Bose. FlightHelmet.com is not an authorized Bose dealer and Bose does not endorse the use of Bose A20 product in helmets. The Bose factory warranty is voided when the headset is converted and installed into a helmet. The Bose A20 system is available with civilian impedance communications and either straight or coiled cord with either G/A dual plugs, U-174 single plug, or LEMO plug. A single plug quick disconnect is avialable as an option for safe egress from the aircraft in emergencies and for convenience. All systems come standard with the Bose A20 control box which includes volume control and blue tooth device connectivity. The LEMO plug option can use panel power for powering the ANR system and the control box on the LEMO, G/A plugs and single plug cords all can power the ANR system with 2 AA batteries. A military Bose conversion is available under a separate part number.
