The soundstream amp does a great job. Like many have already said with that amp you will likely lose most of your FM reception. Didn't matter to me though, all that's on the stations I use to listen to were commercials and talking. I want a radio for music, 4 gig on a smartphone and it's all good all the time. Do yourself the favor and download the install instructions that Ultra has put together. These instructions are VERY accurate and make an install for a novice go like a pro. You really can't mess it up...their that good, as well as an awesome support cast for help if needed.