Hello people, yesterday I bought the N4 and installed it. Incredible unit. I also have a plug and play sirius sportster that i purchased along time ago with a lifetime membership. Is there a way to listen to it through the N4 such as using a aux input? Right now im listening to it by using the fm transmitter. With my old pioneer headunit I purchased a aux input add on box that needed to be powered up and was installed between the Cd changer and the headunit. What I had to do was put a blank CD in the changer to listen to the sportster. Again is there a better way. I dont want to add the sirius tuner option cause i like the mobility of the plug and play.

You should be able to run RCA cables out of your Sportster into the A/V input of the N4. Then you will just have to source the N4 to A/V each time you want to listen to Sirius

Is a/v input on the brain or on the back of the reciever?

the AV inputs are on the brain.