I have the non-Beats system. I've blown my speakers a while back and was looking for something with better distinction. I only play music on my phone, so I bought 4 Infinity Kappa 62iX speakers. I've installed 2 in the front, but I had to turn the treble way down and the midrange down about half way. I think it's because I have tweeters still in the A pillar, in addition to the new ones in the door. I'm now rethinking installing the other pair in the rear quarter panels. I'm thinking there could be too much high end frequency reproduction. I could buy an Infinity component system that has similar stats, but double the price. At least then I would only have 4 tweeters. Thoughts?