I bought an alpine speakers from a local car accessories shop. The model I bought is Alpine SPS-170A. It is a 6.5 inches speakers by Alpine. The maximum power of the speakers is 200 Watt. At normall operation, it can produce around 40 watt of power.
I installed it in my car and it is producing very good sound. the trebel of the Alpine SPS-170A speakers are very good. It is producing treble that is just nice to the ears. As for the bass, Alpine SPS-170A can produce quite a good amount of bass. The bass produced by the speakers are not irritatingto the ears.
Personally, I feel that the speakers are quite worth my money because it is giving a good quality of sound. From the back of the box, there are guides to help the users to install the speakers properly. Since I am not good at connecting thoses speakers, so I just let the workers at the shop to do it.
Overall, I like the sound quality the speakers produce. It makes my car audio system even better in terms of sound clearity as well as treble and bass.