Hello, I am installing a single kx-155 for nav/com operation driving a cdi for vor navigation and as primary com. I have been reading that I need to wire in resistors in series to nav audio hi out and hedphones/comm audio hi out to the headphones ( im using a portable intercom in a 2 seater) so i can avoid using an audio panel. I just want to be able to control the nav audio (ID tones) by turning it on and off on the radio. Any advice as to how to go about it? I have read that by just combining the two wires together i may damage the built in amp inside the radio.