BarixInstreamer - IP Audio Encoder

I received an instreamer 100 part number 2012.8076 from another dealer in february 2016. what are the best mpeg settings? audio has been poor so far.

Can I use this product in pairs with Barix Extremeer 100?

What decoder devices do i need at the client sites, where i have normal pa systems with analog inputs?

Can I use this for my internet radio station. When I turn it on will it automatically connect to my shoutcast hosting and start streaming?