I am truly baffled by what you are saying, Wiz.
The Aux2 connection (stereo GPS) should not be affected (cut) by riders speech. That was the whole point in redesigning the Super Pro Avi and upgrading to the SPA.
I do agree that a phone in Aux 3 should cut the GPS volume in aux 2 by 50%. The designer allowed this because he did not really believe 100% in linking the phone via the GPS.
I am going to play around with my unit at the weekend to see if I'm talking out of my bottom.
The OP doesn't have a Super AVI or a SPA, he has the 1st gen Super Pro Auto (I think).
With this model, the hirachy is as follows:
Input on Aux 1 (goes to Rider only by default) reduces volume on Aux 2 to 50% and reduces volume on Aux 4 to 0%.
Input on Aux 2 (Rider and Pillion) if no input on Aux 1, reduces volume on Aux 4 to 50%.
Input on Aux 4 (Rider and Pillion) affects no other sockets, lowest priority.
In addition to the hierarchy system, when the rider talks and triggers the vox to open, such as when they are talking to the pillion, the volume of the inputs on all Aux sockets other than Aux 3 is cut to 50%, so that they aren't trying to shout over the music paying in either socket.
When you pair your phone with a Zumo, you effectively change the Zumo into a smartphone as it is delivering music/directions and phone calls all via the same wire. Autocom don't recommend you wire it this way because of the problems that causes, although personally I think that being able to operate the phone via the Zumo screen is a real benefit and I don't want to hear SATNAV directions when I'm in a phone call anyway so I don't agree with their caution in the manual.
Autocom Pro Auto manual - Aux 2 said:
You can use some phones via some GPS units, but in most cases you lose the important GPS audio and safety camera warnings while using the phone through a GPS. This is why we provide separate GPS and phone connectivity to manage this better for you.
To be honest, in all the years I've been using bike-bike comms, most of the people at Autocom and Starcom don't seem to understand fully the implications of bundling all audio via the same wire. Even the above statement is not complete in describing all the associated problems.
The only way to really make it work properly, especially if you have a pillion or use bike-bike radios, is to split the phone audio from the Zumo via Bluetooth into Aux 3 and the music via cable into Aux 2 or Aux 4 (doesn't matter which because directions are muted 100% anyway by the Zumo if you're in a phone call). Only then will phone call audio always stay at 100% volume and music audio be muted 100% when you're in a call. Also phone calls won't be heard by your pillion. If you want to be able to hear Nav directions whilst on the phone, you can't hook the phone up via the Zumo, there is no way around that.
Hope that helps.
. eBay is probably best bet...
