Buying speakers for your car is similar to how you would buy speakers for your home. For those of you buying speakers without much audio and/or technical knowledge (car speakers require installation) think about getting a speaker component system, which will save you money. Or pay to have it installed by someone who knows what they're doing, and save yourself the time and hassle.
Now, if you are up to the challenge of building an awesome system for your car, read on for the basics in buying car speakers.
* '''Rule 1'''- Your stereo is only as good as your speakers. If you have a high-power stereo, then you will need high-power speakers to get the right sound output.
* '''Rule 2'''- RMS on your amplifier should match the RMS on your speakers, otherwise they won't have enough power to run properly and you run the risk of destroying your system. Peak power isn't the same as the RMS power. Peak power will always be higher than the RMS, and it is an indicator of how well your speakers will react to quick bursts in volume. The higher the wattage the better, but the higher the volume, the more distortion you will get.
* '''Rule 3'''- Speakers are nothing by themselves (unless you are buying full-range speakers). Component car speakers need additional components to perform well, like a subwoofer, a tweeter, and an amp. These three components together will balance the sound, reduce distortion and produce a better range of lows and highs.
* '''Rule 4'''- Speakers are sensitive too. The stronger the signal they receive, the louder they'll get. If you have a stock head unit, high sensitivity is key, otherwise, don't worry too much about it for multi-amp systems.
* '''Rule 5'''- Check the physical depth you have available to install your new speakers. Get a similar size as your old ones if all you are doing is replacing them. Also, consider whether you might need car speaker mounting brackets.
* '''Rule 6'''- Always be careful of the terminals and other wires that are underneath your car speakers when switching. Don't confuse the positives and negatives. Also, never pry old speakers out with force. Gently remove them, search for hidden screws that may be underneath, and use broad flat tools, not pointy ones, to remove friction fittings if there are any.