You might be asking yourself – “my stock car stereo in your car or truck’s dash has an amplifier built-in, so why replace it?” Or, “Can I use a subwoofer without amplifiers in my car“
There are a variety of reasons why you need an amplifier for your car’s stereo. But the bottom line is, an aftermarket amp does a much better job than a head unit alone. Most external amplifiers aren’t designed to squeeze inside a dash, so they don’t have to compromise on components, power or size. The results is an amplifier that can provide more power and much clearer signal with far less distortion, especially at higher volumes. Not to mention if you’re boosting your bass with a car subwoofer, an amplifier is essential.
Our car amplifier buying guide is filled with products chosen by our expert editors and cover everything you need to know. We’ll explain what channels are and how many you need. We’ll bring you up to speed on power ratings and how to match an amp to your speakers. (You never want to skimp on watts, but you can have too much of a good thing.) We’ll delve into tricky subjects like impedance, which you do need to know about if you want to buy the best amplifier for your car.
A four or five channel amp could power your subwoofer as well as your car speakers, but you might decide to give it each their own dedicated amp. If that’s the case, take a look at the our recommended mono subwoofer amplifiers. (Sometimes also called single channel amplifiers.)
This guide covers the three classes of amplifier so you’ll learn why we prefer Class D, but you can also take a look at our amplifier classes defined article for more information. It even explains the role of CEA2006 certification, in case you’ve wondered what those markings mean.