Conclusion: I mounted four of these on my pontoon boat and was very impressed with the sound. I had also bought a powered subwoofer, but the bass on these is just about good enough to not need it. Highly recommended, especially for the price.
Summary: For the price they are great speakers. I would recommend these for a stock radio. They have a surprising good sound and good base. They come with stainless steel hardware, a real plus with salt water. The front grill is separate from the speakers and snaps on to hide the mounting screws. I will be adding a second pair of Alpine speakers to our boat, I will be buying the larger M700 for my second set. I did not have the room to put the M700 for my replacements speakers.
Summary: Very good speakers. Good amount of bass for just running off the head unit. Also very clear at high volume I've had several other brands that would crackle and sounded horrible at levels I can play these at.
Pros: Very durable and water has yet to hurt them.
Cons: Comes with a silver cover so I painted mine white to match the boat.