Summary: I am glad I decided to try out these speakers. They are my new favorite speakers. Why? For their price, their performance just cannot be beat. I have had my experiences with various brands of speakers. Don't make the mistake I did; don't buy expensive speakers.
Conclusion: These door speakers are great,especially when paired with a Kicker 200.4 amplifier (50 watts per channel at 2 ohms). The speakers are rated at 40 w RMS, so I followed the advice i was given by a pro installer. Make sure the amp is about 10 watts RMS more than the rms handling of the speakers.
Conclusion: 2010 regular cab GMC needed a more than just a radio. Put these in the doors to replace factory speakersthat were totaly dead. Too many choices out there, figured Alpine was as good a choice as any. Another gut call that went well. Very nice sound!!
Conclusion: Really surprised by these speakers (used to do a lot of custom car audio). I bought them locally at a Boxing Day sale after I heard them. Picked up two sets for my winter beater and they sound absolutely fantastic with my Pioneer DEH-X8500BS head unit.