I have discussed with Phil McCandless at Quiet Technologies. He suspects that it has to do with the impedance mismatch issue with the speakers used at the time my two headsets were produced. He suggested that I need to turning the HALO volume way down, which would lower the impedance; I should not exceed one third of the available range. Then compensate by increasing volume on radios and intercom. Is that your experience? When did you purchase your headset?
John