I have a Sony MEX DV-2000 aftermarket deck with the speakers connected to it. Is it possible to add the stock navigation voice to the aftermarket deck somehow?

 

Anyone?

 

you could be creative and use some relays to do this. basically the voltage from the navi voice would trigger a relay, and the relay would change from one pole with the music to the one with the navi voice, then when the prompt ends, it switches back since there is no voltage on the voice/trigger.

 

I take it there is no simple solution?

 

not really... this idea is probably the easiest and the simplest, however I have no idea how many watts of power/voltage/current that the relays can hold before they melt...

 

I should be able to add some simple two channe line output converter to the stock stereo to convert the stock speaker-level outputs to the RCA (low level) inputs to connect those to my AUX in on my aftermarket stereo, right?

Sure, I would have two volume controls, but I'm not concerened about that.