Got a weak, low powered factory stereo system that you want to PUMP UP? We will cover the basics of an aftermarket stereo system, so you can decide just how loud you want to be.


Head Unit: The receiver, the deck, the radio, the stereo. This is the main component and every stereo upgrade will probably include installing a new head unit. Some of the things to consider when looking for a head unit are size, type of media it can play (CD, tape, satellite), power output and security features.

Most head units come in single DIN size (about 2 inches high), but your factory stereo may be double DIN. You can either get an adaptor kit or buy a head unit that is double DIN sized.

Pretty much everybody will want a CD player these days, but you have your choice of single CD or an additional CD switcher that can hold 10 CDs or more. Most newer receivers also include the ability to play MP3 or WMA CDs. There are some head units that still come with tape decks, if you really want them. New satellite ready receivers are very common, which can save you money if you ever want to subscribe to satellite radio, because an additional component is not required.

Power output for receivers is measured in Peak watts and RMS. Pay attention to RMS, which is the actual output from the stereo. The more watts, the louder and crisper (usually) the sound.


Amplifiers: An external amplifier is used to amplify the sound from a head unit, often to hundreds of watts. If you plan to install one, make sure that you find a head unit that has pre-amp outputs on it as it will make installation much easier and result in a better sounding system.


Speakers: New speakers will make your new Head unit sound much better, compared to your factory speakers. If you are installing an amplifier, new speakers are a must to be able to handle the extra power output. Look for speakers with an RMS wattage rating at least as high as the amplifier or head unit does so that they can handle full volume without a chance of blowing. Speakers come in a variety of sizes also, so make sure that you purchase the same size speakers as the ones you are replacing.


Subwoofers: A subwoofer is a large, round speaker (usually between 8 and 12 inches) thats sole purpose is to increase the amount of bass of the stereo system. Subwoofers are installed in their own boxes and are often mounted in the trunk or behind or under seats. If you want to have a loud, booming system with lots of bass, then you will want to install a sub. Make sure that your head unit has a pre-amp output for the subwoofer and that your amp also has a subwoofer connection.


Speaker wire: You might think that all you have to do is just connect everything up to the factory speaker wire and it will work fine. If you are just adding a new Head unit or new speakers to your factory head that may be fine, but if you really want to get the most out of your new system, investing in new high quality speaker wire will ensure that you get the clearest, crispest sound possible. Make sure that you follow the suggested sizes depending on power ratings.


Deciding how far you want to go is up to you. Adding a new head unit is usually the first step, but you can add speakers, an amp or a subwoofer to make your system really rock!