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There are head units that claim to pump out lots of power. In reality, however, head units can never power up your car audio system as well as a dedicated amplifier.

Don't take my word for it. Plug an amplifier between your head unit and speakers. Let's see how wide your eyes roll in pleasant surprise.

Convinced? But how do you know which amplifier is best for you? That's what this article will attempt to accomplish.

Here are a few things that I consider paramount when shopping for an amplifier...

Your personal requirements

What do you want to achieve? Are just trying to improve your factory setup (the audio system that came with your ride)? Do you want to alter the original setup dramatically? Are you going to change everything totally? Are you going to add a pair of subs or many more? Are you going to use component speakers or something else? The questions can go on almost indefinitely.

Now you get the picture? Your requirements will differ depending on what you are after.

Still related to your personal requirements are features that matter most to you. For example, would you prefer an in-built crossover? A crossover will ensure your speakers perform better as it will split a music signal into several frequency ranges. These ranges are then sent to the most appropriate speakers.

How much power do you need? How much power is adequate?

The general rule is to ensure that the amplifier's power rating is, at least, 1 1/2 times the RMS power rating of the speaker it is expected to power.

It is generally better to use an amp that slightly overpowers a speaker than an amp that underpowers it. This is because if for any reason you decide to crank the volume, the amp may start sending square waves (instead of sine waves) to the speakers. Speakers have problems handling these square waves and usually get toasted for that reason.

Your personal playing volumes also matter. If you like banging the sound, you'll certainly need a more powerful amplifier.

And finally, how much bucks you're ready to part with ultimately determines what you can get. But get what is right for you even if it will cost you a little more.

About the Author: Visit car-audio-products-and-accessories.com to read more or visit caraudioplus.co.uk to get your installation accessories. Chimezirim Odimba writes for CAP.