are you putting these in a road glide or street glide? one of the guys I know just ordered these for a road glide and the mount is screwed up or something because they hit when they put the outter fairing back on and they cant get it all the way on. they are gonna call J&M but they are having troubles with them. just so you know.
I have the Rokker speakers in my '08 FLHX fairing and the Rokker amp, with the factory head unit. I love it, and compared to the other two-speaker systems I've heard, the Rokkers sound much better. The Rokker system is surprisingly very clear at high volume levels.
If you're expecting a lot of thump (like a car/truck system), it won't happen with any two-speaker bike system. On a bike, that requires some custom work, more than just a couple small speakers.
Pete at Soundz (vendor on here) installed two 6.5 focals and the arc amp with medallion head unit and it has a surprising amount of bass!! Check him out or ask licmstickmman for his opinion. It's his bike and he had to fork over the dough!