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I may be wrong in this, however, it is my understanding that the i-com function of the audio system isn't mute unless you push the "mute" button. The mic audio is routed to both CB and I-com when you key the CB, so you and your passenger will hear what is being transmitted.
I was using "elect" mics on my 1500 however, when I bought my 2012 1800 I had to redo my mics on the helmets to a dynamic mic because of squeal. The elect mics were over modulating the CB causing a feed back squeal in the audio system.
Because of the close proximity of both mic and speaker in the headset and the I-com function of the unit an audio feedback will happen if the mic sensitivity is to high, this has to be taken into account when designing these systems.
I was using "elect" mics on my 1500 however, when I bought my 2012 1800 I had to redo my mics on the helmets to a dynamic mic because of squeal. The elect mics were over modulating the CB causing a feed back squeal in the audio system.
Because of the close proximity of both mic and speaker in the headset and the I-com function of the unit an audio feedback will happen if the mic sensitivity is to high, this has to be taken into account when designing these systems.
