Shopping for speakers is not as simple as selecting the proper size. With a simple OEM/factory system switch, Sonic Electronix offers direct upgrade packages for a more seamless process. For drivers wanting to build their system from the ground up, the first step is to decide if component or coaxial speakers are better suited for their purposes.
Coaxial speakers are a grouping of multiple speakers into one unit to create one full-range speaker. A coaxial contains a midwoofer and tweeter. It has one set of terminals and a built-in crossover used to separate the mid and high frequencies for each speaker.
Component systems is a set of separate speakers with a mid-range speaker, tweeter and a crossover. The tweeter is not mounted onto the middle of the woofer. Some component systems allow you to manually mount the tweeter in the middle of the woofer, or you can opt to mount it elsewhere since the tweeter is separate from the woofer.
The crossover is also separate from the woofer, so you can choose where to mount it. Unlike the coaxial speakers, the component systems are first connected to the crossover, then to the speaker and finally to the tweeter. While coaxial speakers require one input connection with the speaker wire running directly from the amp, a component system will require three different connections and three sets of speaker wire.
If your car has one speaker per door panel, coaxial speakers are probably the way to go. Component systems require a more advanced install, but for vehicles with separate tweeters, they are a good option. Component systems will likely give you a higher quality sound too.
Check out How to Find the right Speakers for You
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Original Post by Gideon V