John, I must admit that I am not very savy when it comes to the tech side of stereos, amps and speakers. I currently use you Rokker 7.25 speakers and just had a Kenwood KMR-330 marine stereo installed. I use my phone for most of my music and plug into the stereo using the aux. port. I find that the sound is best if I turn the phone volume down and then turn the stereo volume up I get better sound quality at higher levels. Why is that? I am also wanting to install one of your amps but not sure which to go with. I will be adding a new set of bag lids with the speakers already installed. Which amp do you recommend and will the amp clean up the sound or just give me the ability to just have a louder set up?