Audio question?

I wont be running mine on bluetooth, that's why I stated that I will be running a newer style h/u. Possibly something with android auto/apple carplay. I do use Slacker and have the premium subscription and you can download your stations and play them and not use data and also pick the quality you wand to stream at. As for using the Ipod to an amp, you can control the master volume, but there is a sweet spot, and it changes depending on the quality of the album your playing. The newer the recording, usually the better the sound.