I have the 665 dash mounted nim upgrade and sound s like poop....the volume keeps changing ........until I ordered the nim I didnt have one problem............any fix for this
Thanks
More than likely what is happening is your audio from the GPS is triggering the NIM. It's a known side effect, wish they find a way to fix it soon.
Anyhow, what happens is say you set your volume to 50%. Your music creates the same frequency as what the GPS uses to signal the NIM to do its thing. Now the audio is being routed into the radio via the NIM as a mono signal using the bluetooth audio channel.
Your bluetooth audio channel volume may be set to say 25%. Hence the volume swings. What you will need to do is when the volume changes, fiddle with your volume switch. The radio should indicate Bluetooth Volume with the volume bar if you are in the NIM mode. Change the volume to match your normal volume setting or adjust by ear. I have mine set to 50% which matches where I usually have the main volume at when on the freeway.
It is bad enough that the stereo to mono change will make it sound less than ideal. However, you can at least eliminate the volume changes to a degree.
Another way you can set the bluetooth volume without having to wait for it to trigger off your music is to tell the GPS to go somewhere, and when it interrupts to say the nav prompts, change the volume then. You can get it to re-interrupt on command by just hitting the re-calculate button on the main screen.
Hope this works for you.
