If you're unhappy about the sound quality coming from your front and rear car door speakers, then you may need consider replacing them for aftermarket speakers. Factory car speakers are made from cheap materials such as paper and also have low power handling, so they distort more easily. Replacing your factory door speakers with aftermarket ones will increase clarity and also add more loudness to your music. There are two types of car speakers, component speakers are usually fitted in the front. They consist of a separate tweeter and mid-range speaker. Component speakers will have a crossover box to ensure the correct frequencies are being set to each speaker to ensure the best sound. Some cheaper component set speakers don't have a standalone crossover box and have a tweeter attached onto the positive terminal, which is a low cost solution, but it works. Coaxial speakers on the other hand, have a tweeter placed within the centre of the car speaker. This means that fitting is also easier and coaxial speakers are usually cheaper to purchase. Coaxial speakers tend to be used in the rear of a vehicle to provide sound in the back.
Sound deadening material can also make your car door speakers sound more clear and louder. This is because it stops vibrations and rattles from the bass your car speakers play. Also, you can apply sound deadening material to any holes or gaps that are found behind the car door card. This will then allow you to cover any holes to improve midbass response and it will help make the inside of the door an enclosure for the car speaker as best as possible. You can also apply foam rings around the speaker, so when you apply the car door card back on, all the sound will travel through the ring and not escape around the gaps around the speaker. This will provide a tight a refined car audio sound.
Upgrade the factory headunit can make a huge difference. Factory headunits have poor sound quality and also minimal features to fine tune the sound. Aftermarket headunits from brands such as pioneer or kenwood, will have an equalizer setting with adjustable sliders that you can adjust to gain more out of our system. Higher end units will have a high quality DAC chip that will process the sound to an higher bit rate so you hear all them extra details in your music. You can have settings such as high pass filter to reduce the amount of bass your car door speakers play so you gain a clearer sound. The HPF should ideally be set at 80HZ or 120HZ and a subwoofer should be installed for it to take over the low end frequencies. With an basic factory headunit unit, you just get the basic audio settings such as bass and treble, which lets be honest is very basic.
Adding an amplifier is always a good idea, this is because you gain more loudness with less distortion. Internal amplifiers within an headunit factory or aftermarket are usually rated around 20 rms, which is not a lot of power. Adding a four channel class ab car amp will provide you with clear sound. Make sure you use high quality RCA cables and run them on the separate side of the car, away from the red power wire to reduce buzzing and interference. High quality speaker wire 14 gauge should ideally be run to each speaker and you should never use factory wiring. Factory wiring is cheap and also thin, it can't really handle a lot of power in the long term.
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