1) Position the 'Talk' side of the microphone (indicated by a solid white dot just outside of the windscreen) to be pointed directly toward your mouth.  The microphone should be close enough that your lips will touch the windscreen when you purse them, but not so close that they touch when you talk.

2) Increase the Microphone Gain by sliding the switch at the top of the UFM forward.

3) Gently move the cable in different directions near any junction with a plug or housing.  If the microphone cuts in and out with movement then there is a fault and the component with the fault will need to be replaced.

Sidetone is solely a function of the aircraft radio/intercom.  There is no circuitry in the headset that feeds microphone audio back to the headphone speakers.  Any controls for sidetone will be found on the radio or intercom.

If you are also getting reports of weak transmissions, please review the 'Microphone Weak or Inoperative' troubleshooting steps above as weak microphone output can also affect sidetone level.

1) Position the 'Talk' side of the microphone (indicated by a solid white dot just outside of the windscreen) to be pointed directly toward your mouth.  The microphone should be close enough that your lips will touch the windscreen when you purse them, but not so close that they touch when you talk.

2) Adjust the Microphone Gain (the switch at the top of the UFM) to find the proper balance point between low cockpit noise and strong transmissions.

This is usually a result of Radio Frequency Interference (RFI).  This issue can be particularly problematic for hand-held radios as they are often high powered and the antenna is in extremely close proximity to the headset.  There a few things that may help alleviate this issue.

1) Move the headset as far away from the antenna as possible.

2) Adjust the angle of the cord in relation to the antenna.

3) Lower the Microphone Gain.

This is usually a result of Radio Frequency Interference (RFI).  This issue can be particularly problematic for hand-held radios as they are often high powered and the antenna is in extremely close proximity to the headset.  There a few things that may help alleviate this issue.

1) Move the headset as far away from the antenna as possible.

2) Adjust the angle of the cord in relation to the antenna.

3) Lower the Microphone Gain.

 1) Verify that the Bose headphones have a good battery and are turned on.

2) Clean the plugs that connect to the headphones and aircraft with rubbing alcohol and a clean cloth.  Be gentle to avoid bending any pins or plugs.

3) Test the headphones separately from the UFM to verify that they are functioning properly.

 1) Verify the Mono/Stereo switch is in the proper position.  Mono (one bar) position when used with a Mono Comm Panel or Stereo (two bar) position when used with Stereo Comm Panels.  If you are unsure, it's probably Mono.

2) Clean the plugs that connect to the headphones and aircraft with rubbing alcohol and a clean cloth.  Be gentle to avoid bending any pins or plugs.

3) Test the headphones separately from the UFM to verify that they are functioning properly.

 1) Verify that the Audio is turned up on the External Device while the UFM is attached.

2) Clean the plugs that connect to the headphones and both plugs of the Auxiliary Cable.  Be gentle to avoid bending any pins or plugs.

3) Test the headphones separately from the UFM to verify that they are functioning properly.

4) Try a different Auxiliary Cord (our Aux Cords are standard four conductor cables found at most electronics retailers).