I have a 05 TSX with navi. I will be replacing all my speakers with alpine type S , and those will be running off a sony zf704 amp .My question is, when the amp is bypassed and and all the wiring is hooked into the new amp , will I still have my "voice" from the navi system , or is there something else i need to do? Thanks in advance.

 

That is a very good question. I await an answer to this as well.

 

You can’t connect that sony directly to the factory HU. See my response for the BALUN question.

https://acurazine.com/forums/audio-video-electronics-navigation-22/whats-ballun-balun-mercman-765284/

If you do it right you will keep your voice.

Jeff