I have a 2008 Infiniti car that only comes with RCA (Aux) and power outlet in the middle console. So I have this old 2nd Gen Ipod touch and hooked up to the 3.5mm plug to RCA. The sound is so clear compared to my car's head unit. The only problem is since it is an RCA and not USB, i cannot control the itouch through the head unit excoet the volume.
So I searched online and found out about the Tango remote app. You can use any apple device with a bluetooth capabilites and you now can control the other apple device. Initially, i used the Ipad as the remote and the old itouch as the audio player and it works seemlessly.
I was so happy that I decided to buy a Gen5 itouch and use it as the audio player and the old itouch as my remote. Using the Tango app, I could navigate through the GEN 5 itouch audio files using the remote old itouch. It is like having all my music being access (controlled) through the Car's head unit, but better bec. The control is on the palm of my hanf.
Sound is excellent using the Gen5 itouch. My car speaker are Poineer TSD1602R. Beautiful clear sound coming from both speakers and Gen5 itouch. It will be a plus to anyone if they already have an iphone. They can use the iphone as a remote control.